Physical (phy) layer and media access control (mac) layer operations following uplink cancellation indication (ulci)

ABSTRACT

Methods, systems, and devices for wireless communications are described. The method, system, or devices for wireless communications may implement receiving a grant for a first transmission scheduled for a first set of resources, the first transmission associated with a first transmission parameter; receiving an indication to cancel the first transmission; dropping the first transmission based on receiving the indication; determining a second transmission parameter for a second transmission based on the first transmission parameter and irrespective of dropping the first transmission; and performing or receiving the second transmission according to the second transmission parameter. Alternatively, a device may receive an indication to cancel the second transmission; drop the second transmission based on receiving the indication; and refraining from rescheduling the first transmission on the first set of resources based on receiving the indication and irrespective of dropping the second transmission.

CROSS REFERENCE

The present application for patent is a Continuation of U.S. patentapplication Ser. No. 17/188,973 by YANG et al., entitled “PHYSCIAL (PHY)LAYER AND MEDIA ACCESS CONTROL (MAC) LAYER OPERATIONS FOLLOWING UPLINKCANCELLATION INDICATION (ULCI) filed Mar. 1, 2021, which claims thebenefit of U.S. Provisional Patent Application No. 62/984,206 by YANG etal., entitled “PHYSICAL (PHY) LAYER AND MEDIA ACCESS CONTROL (MAC) LAYEROPERATIONS FOLLOWING UPLINK CANCELLATION INDICATION (ULCI),” filed Mar.2, 2020, and the benefit of U.S. Provisional Patent Application No.62/992,031 by YANG et al., entitled “PHYSICAL (PHY) LAYER AND MEDIAACCESS CONTROL (MAC) LAYER OPERATIONS FOLLOWING UPLINK CANCELLATIONINDICATION (ULCI),” filed Mar. 19, 2020, each of which is assigned tothe assignee hereof, and each of which is expressly incorporated byreference herein.

FIELD OF TECHNOLOGY

The following relates generally to wireless communications and morespecifically to physical (PHY) layer and media access control (MAC)layer operations following uplink cancellation indication (ULCI).

BACKGROUND

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. These systems may be capable ofsupporting communication with multiple users by sharing the availablesystem resources (e.g., time, frequency, and power). Examples of suchmultiple-access systems include fourth generation (4G) systems such asLong Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, orLTE-A Pro systems, and fifth generation (5G) systems which may bereferred to as New Radio (NR) systems. These systems may employtechnologies such as code division multiple access (CDMA), time divisionmultiple access (TDMA), frequency division multiple access (FDMA),orthogonal frequency division multiple access (OFDMA), or discreteFourier transform spread orthogonal frequency division multiplexing(DFT-S-OFDM). A wireless multiple-access communications system mayinclude one or more base stations or one or more network access nodes,each simultaneously supporting communication for multiple communicationdevices, which may be otherwise known as user equipment (UE).

SUMMARY

The described techniques relate to improved methods, systems, devices,and apparatuses that support physical (PHY) layer and media accesscontrol (MAC) layer operations following uplink cancellation indication(ULCI). Generally, the described techniques provide for handlingtransmission cancellations at the PHY and MAC layers. For example, auser equipment (UE) may receive an indication from a base stationcancelling at least a portion of an uplink or downlink transmission touse the resources previously allocated to the uplink or downlinktransmission instead for a higher priority uplink or downlinktransmission (e.g., an ultra-reliable low latency (URLLC) transmissionfrom another UE). The UE may cancel at least a portion of the specifiedtransmission based on receiving the indication, which may be an uplinkcancellation indication (ULCI), a slot format indicator (SFI), downlinkcontrol information (DCI), or a downlink or uplink grant. In some cases,the UE may be scheduled for full duplexed communications, but may be(e.g., only be) configured for half duplex communications.

As described herein, the UE may determine a response to the cancellationindication, in particular at the PHY or MAC layers. For instance, the UEmay determine how to perform power control calculations, intra-UEmultiplexing, and new data indicator counting based on the cancellationindication. For example, a UE may receive a grant, from the basestation, for a first transmission associated with a first transmissionparameter scheduled on a first set of resources. The base station maydetermine that a different transmission from the first transmission maybe scheduled on a set of resources at least partially overlapping thefirst set of resources. For example, a higher priority transmission thanthe first transmission may be scheduled. The base station may generate acancellation indication based on the high priority transmission beingscheduled. The UE may receive the cancellation indication, from the basestation, indicating to at least partially cancel the first transmission.As a result, the UE may drop at least a portion of the firsttransmission based on receiving the indication. The UE may determine asecond transmission parameter for a second transmission based at leastin part on the first transmission parameter and irrespective of droppingthe first transmission, and the UE may transmit or receive the secondtransmission according to the second transmission parameter.

Additionally, or alternatively, a UE may receive a first grant for afirst transmission scheduled for a first set of resources and a secondgrant for a second transmission scheduled for a second set of resourcesthat overlaps with the first set of resources. The UE may follow anintra-UE conflict resolution (e.g., multiplexing), which may result inthe UE dropping at least a portion of the first transmission based onreceiving the second grant. A base station may determine that adifferent transmission from the first or second transmission may bescheduled on a set of resources at least partially overlapping thesecond set of resources. For example, a higher priority transmissionthan the second transmission (e.g., a dynamically scheduledtransmission) may be scheduled. The base station may generate acancellation indication based on the high priority transmission beingscheduled. After dropping a portion of the first transmission, the UEmay receive the cancellation indication from the base station to atleast partially cancel the second transmission, and the UE may drop atleast a portion of the second transmission. Although the conflict of thesecond transmission with the first transmission is resolved based on thecancellation indication, the UE may refrain from rescheduling the firsttransmission on the first set of resources. Thus, the cancellationindication will be applied after the MAC and PHY layer procedures arecomplete and not change previous actions taken (e.g., for conflictresolution).

A method of wireless communications at a UE is described. The method mayinclude receiving a grant for a first transmission scheduled for a firstset of resources, the first transmission associated with a firsttransmission parameter, receiving an indication for the UE to at leastpartially cancel the first transmission, dropping at least a portion ofthe first transmission based on receiving the indication, determining asecond transmission parameter for a second transmission based on thefirst transmission parameter and irrespective of dropping the firsttransmission, and performing or receiving the second transmissionaccording to the second transmission parameter.

An apparatus for wireless communications at a UE is described. Theapparatus may include a processor, memory coupled with the processor,and instructions stored in the memory. The instructions may beexecutable by the processor to cause the apparatus to receive a grantfor a first transmission scheduled for a first set of resources, thefirst transmission associated with a first transmission parameter,receive an indication for the UE to at least partially cancel the firsttransmission, drop at least a portion of the first transmission based onreceiving the indication, determine a second transmission parameter fora second transmission based on the first transmission parameter andirrespective of dropping the first transmission, and perform or receivethe second transmission according to the second transmission parameter.

Another apparatus for wireless communications at a UE is described. Theapparatus may include means for receiving a grant for a firsttransmission scheduled for a first set of resources, the firsttransmission associated with a first transmission parameter, receivingan indication for the UE to at least partially cancel the firsttransmission, dropping at least a portion of the first transmissionbased on receiving the indication, determining a second transmissionparameter for a second transmission based on the first transmissionparameter and irrespective of dropping the first transmission, andperforming or receiving the second transmission according to the secondtransmission parameter.

A non-transitory computer-readable medium storing code for wirelesscommunications at a UE is described. The code may include instructionsexecutable by a processor to receive a grant for a first transmissionscheduled for a first set of resources, the first transmissionassociated with a first transmission parameter, receive an indicationfor the UE to at least partially cancel the first transmission, drop atleast a portion of the first transmission based on receiving theindication, determine a second transmission parameter for a secondtransmission based on the first transmission parameter and irrespectiveof dropping the first transmission, and perform or receive the secondtransmission according to the second transmission parameter.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, determining the secondtransmission parameter for the second transmission further may includeoperations, features, means, or instructions for determining a firsttransmit power for the second transmission relative to a second transmitpower of the first transmission indicated by the grant irrespective ofdropping the first transmission, where the second transmission parameterfor the second transmission may be the first transmit power.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting a powerheadroom report based on the determined first transmit power and thesecond transmit power irrespective of dropping the first transmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, determining the secondtransmission parameter for the second transmission further may includeoperations, features, means, or instructions for determining a togglestate of a new data indicator for the second transmission irrespectiveof dropping the first transmission, where the second transmissionparameter for the second transmission includes the toggle state of thenew data indicator, and where performing or receiving the secondtransmission may be based on the determined toggle state of the new dataindicator for the second transmission.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining the togglestate of the new data indicator for the second transmission may be basedon a difference between a first new data indicator associated with thefirst transmission indicated by the grant and a second new dataindicator associated with the second transmission.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for generating, at a mediaaccess control layer, a protocol data unit based on receiving the grant,and determining a buffer status of a data buffer at the media accesscontrol layer based on the first set of resources and irrespective ofdropping the first transmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, determining the buffer statusof the data buffer further may include operations, features, means, orinstructions for transferring the protocol data unit from the databuffer at the media access control layer to a hybrid automatic repeatrequest buffer at a physical layer based on the first set of resourcesand irrespective of dropping the first transmission, storing a transportblock of the protocol data unit in the hybrid automatic repeat requestbuffer at the physical layer, and refraining from restoring the protocoldata unit in the data buffer at the media access control layer based ondropping the second transmission.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining acapability report indicating a number of receptions the UE may becapable of receiving in a slot or indicating a number of transmissionsthe UE may be capable of performing in the slot, and performing orreceiving the second transmission according to the second transmissionparameter based on the capability report irrespective of dropping thefirst transmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the UE may be configured forhalf duplex communications, and where the grant includes radio resourcecontrol signaling for a set of flexible symbols. In some examples of themethod, apparatuses, and non-transitory computer-readable mediumdescribed herein, the indication includes a slot format indicator ordownlink control information.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first transmission andthe second transmission include an uplink transmission, or the firsttransmission and the second transmission include a downlinktransmission. In some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein, the firsttransmission includes a physical uplink shared channel, physical uplinkcontrol channel, physical random access channel, a sounding referencesignal, a physical downlink shared channel, or a channel stateinformation reference signal. In some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein, the indication includes an uplink cancellation indication.

A method of wireless communications at a base station is described. Themethod may include transmitting, to a UE, a grant for a firsttransmission scheduled for a first set of resources, the firsttransmission associated with a first transmission parameter,transmitting an indication for the UE to at least partially cancel thefirst transmission based on a second transmission scheduled for a secondset of resource that overlaps with the first set of resources,determining a second transmission parameter for a third transmissionbased on the first transmission parameter, and performing or receivingthe third transmission according to the second transmission parameter.

An apparatus for wireless communications at a base station is described.The apparatus may include a processor, memory coupled with theprocessor, and instructions stored in the memory. The instructions maybe executable by the processor to cause the apparatus to transmit, to aUE, a grant for a first transmission scheduled for a first set ofresources, the first transmission associated with a first transmissionparameter, transmit an indication for the UE to at least partiallycancel the first transmission based on a second transmission scheduledfor a second set of resource that overlaps with the first set ofresources, determine a second transmission parameter for a thirdtransmission based on the first transmission parameter, and perform orreceive the third transmission according to the second transmissionparameter.

Another apparatus for wireless communications at a base station isdescribed. The apparatus may include means for transmitting, to a UE, agrant for a first transmission scheduled for a first set of resources,the first transmission associated with a first transmission parameter,transmitting an indication for the UE to at least partially cancel thefirst transmission based on a second transmission scheduled for a secondset of resource that overlaps with the first set of resources,determining a second transmission parameter for a third transmissionbased on the first transmission parameter, and performing or receivingthe third transmission according to the second transmission parameter.

A non-transitory computer-readable medium storing code for wirelesscommunications at a base station is described. The code may includeinstructions executable by a processor to transmit, to a UE, a grant fora first transmission scheduled for a first set of resources, the firsttransmission associated with a first transmission parameter, transmit anindication for the UE to at least partially cancel the firsttransmission based on a second transmission scheduled for a second setof resource that overlaps with the first set of resources, determine asecond transmission parameter for a third transmission based on thefirst transmission parameter, and perform or receive the thirdtransmission according to the second transmission parameter.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, determining the secondtransmission parameter for the third transmission further may includeoperations, features, means, or instructions for determining a firsttransmit power for the third transmission relative to a second transmitpower of the first transmission indicated by the grant irrespective ofthe indication, where the second transmission parameter for the thirdtransmission may be the first transmit power.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a powerheadroom report including a first transmit power of the firsttransmission and a second transmit power of the third transmissionirrespective of the indication.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, determining the secondtransmission parameter for the third transmission further may includeoperations, features, means, or instructions for determining whether thethird transmission includes new data with respect to the firsttransmission irrespective of the indication, and determining a togglestate of a new data indicator for the third transmission based ondetermining whether the third transmission includes the new data, wherethe second transmission parameter for the third transmission includesthe toggle state of the new data indicator.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving a capabilityreport indicating a number of receptions that the UE may be capable ofreceiving in a slot or indicating a number of transmissions the UE maybe capable of performing in the slot, and performing or receiving thethird transmission according to the second transmission parameter basedon the capability report irrespective of the indication.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the UE may be configured forhalf duplex communications, and where the grant includes radio resourcecontrol signaling for a set of flexible symbols. In some examples of themethod, apparatuses, and non-transitory computer-readable mediumdescribed herein, the indication includes a slot format indicator ordownlink control information.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first transmission andthe third transmission include an uplink transmission and the secondtransmission includes a downlink transmission, or the first transmissionand the third transmission include a downlink transmission and thesecond transmission includes an uplink transmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first transmissionincludes a physical uplink shared channel, physical uplink controlchannel, physical random access channel, a sounding reference signal, aphysical downlink shared channel, or a channel state informationreference signal. In some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein, the indicationincludes an uplink cancellation indication.

A method of wireless communications at a UE is described. The method mayinclude receiving a first grant for a first transmission scheduled for afirst set of resources, receiving a second grant for a secondtransmission scheduled for a second set of resource that overlaps withthe first set of resources, dropping at least a portion of the firsttransmission based on receiving the second grant, receiving anindication for the UE to at least partially cancel the secondtransmission, dropping at least a portion of the second transmissionbased on receiving the indication, and refraining from rescheduling thefirst transmission on the first set of resources based on receiving theindication and irrespective of dropping the second transmission.

An apparatus for wireless communications at a UE is described. Theapparatus may include a processor, memory coupled with the processor,and instructions stored in the memory. The instructions may beexecutable by the processor to cause the apparatus to receive a firstgrant for a first transmission scheduled for a first set of resources,receive a second grant for a second transmission scheduled for a secondset of resource that overlaps with the first set of resources, drop atleast a portion of the first transmission based on receiving the secondgrant, receive an indication for the UE to at least partially cancel thesecond transmission, drop at least a portion of the second transmissionbased on receiving the indication, and refrain from rescheduling thefirst transmission on the first set of resources based on receiving theindication and irrespective of dropping the second transmission.

Another apparatus for wireless communications at a UE is described. Theapparatus may include means for receiving a first grant for a firsttransmission scheduled for a first set of resources, receiving a secondgrant for a second transmission scheduled for a second set of resourcethat overlaps with the first set of resources, dropping at least aportion of the first transmission based on receiving the second grant,receiving an indication for the UE to at least partially cancel thesecond transmission, dropping at least a portion of the secondtransmission based on receiving the indication, and refraining fromrescheduling the first transmission on the first set of resources basedon receiving the indication and irrespective of dropping the secondtransmission.

A non-transitory computer-readable medium storing code for wirelesscommunications at a UE is described. The code may include instructionsexecutable by a processor to receive a first grant for a firsttransmission scheduled for a first set of resources, receive a secondgrant for a second transmission scheduled for a second set of resourcethat overlaps with the first set of resources, drop at least a portionof the first transmission based on receiving the second grant, receivean indication for the UE to at least partially cancel the secondtransmission, drop at least a portion of the second transmission basedon receiving the indication, and refrain from rescheduling the firsttransmission on the first set of resources based on receiving theindication and irrespective of dropping the second transmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, refraining from reschedulingthe first transmission further may include operations, features, means,or instructions for cancelling reception of the first transmissionirrespective of dropping the second transmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first transmissionincludes a semi-statically configured downlink transmission and thesecond transmission includes a dynamically scheduled uplinktransmission. In some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein, refrainingfrom rescheduling the first transmission further may include operations,features, means, or instructions for cancelling transmission of thefirst transmission irrespective of dropping the second transmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first transmissionincludes a first uplink transmission and the second transmissionincludes a second uplink transmission, and where the first grantincludes a configured grant and the second grant includes a dynamicgrant. In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the indication includes anuplink cancellation indication.

A method of wireless communications at a base station is described. Themethod may include transmitting a first grant for a first transmissionscheduled for a first set of resources, transmitting a second grant fora second transmission scheduled for a second set of resource thatoverlaps with the first set of resources, transmitting an indication forthe UE to at least partially cancel the second transmission based on athird transmission scheduled for a third set of resource that overlapswith the second set of resources, and refraining from rescheduling thefirst transmission on the first set of resources based on transmittingthe indication.

An apparatus for wireless communications at a base station is described.The apparatus may include a processor, memory coupled with theprocessor, and instructions stored in the memory. The instructions maybe executable by the processor to cause the apparatus to transmit afirst grant for a first transmission scheduled for a first set ofresources, transmit a second grant for a second transmission scheduledfor a second set of resource that overlaps with the first set ofresources, transmit an indication for the UE to at least partiallycancel the second transmission based on a third transmission scheduledfor a third set of resource that overlaps with the second set ofresources, and refrain from rescheduling the first transmission on thefirst set of resources based on transmitting the indication.

Another apparatus for wireless communications at a base station isdescribed. The apparatus may include means for transmitting a firstgrant for a first transmission scheduled for a first set of resources,transmitting a second grant for a second transmission scheduled for asecond set of resource that overlaps with the first set of resources,transmitting an indication for the UE to at least partially cancel thesecond transmission based on a third transmission scheduled for a thirdset of resource that overlaps with the second set of resources, andrefraining from rescheduling the first transmission on the first set ofresources based on transmitting the indication.

A non-transitory computer-readable medium storing code for wirelesscommunications at a base station is described. The code may includeinstructions executable by a processor to transmit a first grant for afirst transmission scheduled for a first set of resources, transmit asecond grant for a second transmission scheduled for a second set ofresource that overlaps with the first set of resources, transmit anindication for the UE to at least partially cancel the secondtransmission based on a third transmission scheduled for a third set ofresource that overlaps with the second set of resources, and refrainfrom rescheduling the first transmission on the first set of resourcesbased on transmitting the indication.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, refraining from reschedulingthe first transmission further may include operations, features, means,or instructions for cancelling transmission of the first transmissionirrespective of the indication.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first transmissionincludes a semi-statically configured downlink transmission and thesecond transmission includes a dynamically scheduled uplinktransmission. In some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein, refrainingfrom rescheduling the first transmission further may include operations,features, means, or instructions for cancelling reception of the firsttransmission irrespective of the indication.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first transmissionincludes a first uplink transmission and the second transmissionincludes a second uplink transmission, and where the first grantincludes a configured grant and the second grant includes a dynamicgrant. In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the indication includes anuplink cancellation indication.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a wireless communications system thatsupports physical (PHY) layer and media access control (MAC) layeroperations following uplink cancellation indication (ULCI) in accordancewith aspects of the present disclosure.

FIG. 2 illustrates an example of a wireless communications system thatsupports PHY layer and MAC layer operations following ULCI in accordancewith aspects of the present disclosure.

FIG. 3 illustrates an example of a timeline that supports PHY layer andMAC layer operations following ULCI in accordance with aspects of thepresent disclosure.

FIGS. 4A and 4B illustrate examples of a timeline that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure.

FIG. 5 illustrates an example of a process flow that supports PHY layerand MAC layer operations following ULCI in accordance with aspects ofthe present disclosure.

FIG. 6 illustrates an example of a process flow that supports PHY layerand MAC layer operations following ULCI in accordance with aspects ofthe present disclosure.

FIGS. 7 and 8 show block diagrams of devices that support PHY layer andMAC layer operations following ULCI in accordance with aspects of thepresent disclosure.

FIG. 9 shows a block diagram of a communications manager that supportsPHY layer and MAC layer operations following ULCI in accordance withaspects of the present disclosure.

FIG. 10 shows a diagram of a system including a device that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure.

FIGS. 11 and 12 show block diagrams of devices that support PHY layerand MAC layer operations following ULCI in accordance with aspects ofthe present disclosure.

FIG. 13 shows a block diagram of a communications manager that supportsPHY layer and MAC layer operations following ULCI in accordance withaspects of the present disclosure.

FIG. 14 shows a diagram of a system including a device that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure.

FIGS. 15 through 20 show flowcharts illustrating methods that supportPHY layer and MAC layer operations following ULCI in accordance withaspects of the present disclosure.

DETAILED DESCRIPTION

In some wireless communications systems, a user equipment (UE) maysupport the use of a cancellation indication, also known as a preemptionindication, to configure overlapping transmissions based on priority. Abase station may transmit a cancellation indication to a UE requestingat least a portion of a transmission. As a result, the UE may cancelreception or transmission of at least part of the indicatedtransmission. The UE also may perform physical (PHY) layer and mediaaccess control (MAC) layer procedures following reception of acancellation indication. In some cases, a UE may be configured with aspecific order of procedures when a cancellation indication issupported, and the configured order of operations may allow a UE toefficiently perform layer procedures, transmission cancellation, andreception or transmission of subsequent transmissions.

For example, the order of operation may apply to all PHY and MAC layerprocedures or may be specific to unique PHY or MAC layer procedures. Theconfigured order may allow the UE to reduce transmission latency byreducing the number of changes to the PHY or MAC layer procedures. Insome examples, there may be no updates to previously performed PHY andMAC layer procedures when a UE receives a cancellation indication. ThePHY and MAC layer procedures may include power control, intra-UEmultiplexing, new data indicator (NDI) counting, MAC protocol data unit(PDU) generation, buffer management, as well as other PHY and MACoperations.

The order of operation may apply to uplink and downlink operations, andin some cases, a UE may be constrained to half-duplex communications.For example, a number of uplink transmissions may be configured at a UE,and the UE may then receive a cancellation indication cancelling atleast a portion of an uplink transmission. After the UE drops the uplinktransmission, the UE may determine transmission parameters for theremainder of uplink transmissions as if the specified transmission wasnot dropped. In another example, a number of downlink transmissions maybe configured to be received by a UE, and a dynamically scheduleddownlink transmission may preempt one of the previously configureddownlink transmissions. Thus, the base station may transmit acancellation indication to the UE indicating another transmission willpreempt at least a portion of a previously scheduled downlinktransmission. After the UE drops the indication portion of the indicatedtransmission, the UE may refrain from updating a previously determinedtransmission parameter for the remaining downlink transmissions. In somecases, both downlink and uplink transmissions may be considered in theconfigured order of operations.

Aspects of the disclosure are initially described in the context ofwireless communications systems. Aspects of the disclosure are furtherillustrated by and described with reference to apparatus diagrams,system diagrams, and flowcharts that relate to PHY layer and MAC layeroperations following uplink cancellation indication (ULCI).

FIG. 1 illustrates an example of a wireless communications system 100that supports PHY layer and MAC layer operations following ULCI inaccordance with aspects of the present disclosure. The wirelesscommunications system 100 may include one or more base stations 105, oneor more UEs 115, and a core network 130. In some examples, the wirelesscommunications system 100 may be a Long Term Evolution (LTE) network, anLTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR)network. In some examples, the wireless communications system 100 maysupport enhanced broadband communications, ultra-reliable (e.g., missioncritical) communications, low latency communications, communicationswith low-cost and low-complexity devices, or any combination thereof.

The base stations 105 may be dispersed throughout a geographic area toform the wireless communications system 100 and may be devices indifferent forms or having different capabilities. The base stations 105and the UEs 115 may wirelessly communicate via one or more communicationlinks 125. Each base station 105 may provide a coverage area 110 overwhich the UEs 115 and the base station 105 may establish one or morecommunication links 125. The coverage area 110 may be an example of ageographic area over which a base station 105 and a UE 115 may supportthe communication of signals according to one or more radio accesstechnologies.

The UEs 115 may be dispersed throughout a coverage area 110 of thewireless communications system 100, and each UE 115 may be stationary,or mobile, or both at different times. The UEs 115 may be devices indifferent forms or having different capabilities. Some example UEs 115are illustrated in FIG. 1 . The UEs 115 described herein may be able tocommunicate with various types of devices, such as other UEs 115, thebase stations 105, or network equipment (e.g., core network nodes, relaydevices, integrated access and backhaul (IAB) nodes, or other networkequipment), as shown in FIG. 1 .

The base stations 105 may communicate with the core network 130, or withone another, or both. For example, the base stations 105 may interfacewith the core network 130 through one or more backhaul links 120 (e.g.,via an S1, N2, N3, or other interface). The base stations 105 maycommunicate with one another over the backhaul links 120 (e.g., via anX2, Xn, or other interface) either directly (e.g., directly between basestations 105), or indirectly (e.g., via core network 130), or both. Insome examples, the backhaul links 120 may be or include one or morewireless links.

One or more of the base stations 105 described herein may include or maybe referred to by a person having ordinary skill in the art as a basetransceiver station, a radio base station, an access point, a radiotransceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or agiga-NodeB (either of which may be referred to as a gNB), a Home NodeB,a Home eNodeB, or other suitable terminology.

A UE 115 may include or may be referred to as a mobile device, awireless device, a remote device, a handheld device, or a subscriberdevice, or some other suitable terminology, where the “device” may alsobe referred to as a unit, a station, a terminal, or a client, amongother examples. A UE 115 may also include or may be referred to as apersonal electronic device such as a cellular phone, a personal digitalassistant (PDA), a tablet computer, a laptop computer, or a personalcomputer. In some examples, a UE 115 may include or be referred to as awireless local loop (WLL) station, an Internet of Things (IoT) device,an Internet of Everything (IoE) device, or a machine type communications(MTC) device, among other examples, which may be implemented in variousobjects such as appliances, or vehicles, meters, among other examples.

The UEs 115 described herein may be able to communicate with varioustypes of devices, such as other UEs 115 that may sometimes act as relaysas well as the base stations 105 and the network equipment includingmacro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations,among other examples, as shown in FIG. 1 .

The UEs 115 and the base stations 105 may wirelessly communicate withone another via one or more communication links 125 over one or morecarriers. The term “carrier” may refer to a set of radio frequencyspectrum resources having a defined physical layer structure forsupporting the communication links 125. For example, a carrier used fora communication link 125 may include a portion of a radio frequencyspectrum band (e.g., a bandwidth part (BWP)) that is operated accordingto one or more physical layer channels for a given radio accesstechnology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layerchannel may carry acquisition signaling (e.g., synchronization signals,system information), control signaling that coordinates operation forthe carrier, user data, or other signaling. The wireless communicationssystem 100 may support communication with a UE 115 using carrieraggregation or multi-carrier operation. A UE 115 may be configured withmultiple downlink component carriers and one or more uplink componentcarriers according to a carrier aggregation configuration. Carrieraggregation may be used with both frequency division duplexing (FDD) andtime division duplexing (TDD) component carriers.

In some examples (e.g., in a carrier aggregation configuration), acarrier may also have acquisition signaling or control signaling thatcoordinates operations for other carriers. A carrier may be associatedwith a frequency channel (e.g., an evolved universal mobiletelecommunication system terrestrial radio access (E-UTRA) absoluteradio frequency channel number (EARFCN)) and may be positioned accordingto a channel raster for discovery by the UEs 115. A carrier may beoperated in a standalone mode where initial acquisition and connectionmay be conducted by the UEs 115 via the carrier, or the carrier may beoperated in a non-standalone mode where a connection is anchored using adifferent carrier (e.g., of the same or a different radio accesstechnology).

The communication links 125 shown in the wireless communications system100 may include uplink transmissions from a UE 115 to a base station105, or downlink transmissions from a base station 105 to a UE 115.Carriers may carry downlink or uplink communications (e.g., in an FDDmode) or may be configured to carry downlink and uplink communications(e.g., in a TDD mode).

A carrier may be associated with a particular bandwidth of the radiofrequency spectrum, and in some examples the carrier bandwidth may bereferred to as a “system bandwidth” of the carrier or the wirelesscommunications system 100. For example, the carrier bandwidth may be oneof a number of determined bandwidths for carriers of a particular radioaccess technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz(MHz)). Devices of the wireless communications system 100 (e.g., thebase stations 105, the UEs 115, or both) may have hardwareconfigurations that support communications over a particular carrierbandwidth or may be configurable to support communications over one of aset of carrier bandwidths. In some examples, the wireless communicationssystem 100 may include base stations 105 or UEs 115 that supportsimultaneous communications via carriers associated with multiplecarrier bandwidths. In some examples, each served UE 115 may beconfigured for operating over portions (e.g., a sub-band, a BWP) or allof a carrier bandwidth.

Signal waveforms transmitted over a carrier may be made up of multiplesubcarriers (e.g., using multi-carrier modulation (MCM) techniques suchas orthogonal frequency division multiplexing (OFDM) or discrete Fouriertransform spread OFDM (DFT-S-OFDM)). In a system employing MCMtechniques, a resource element may include one symbol period (e.g., aduration of one modulation symbol) and one subcarrier, where the symbolperiod and subcarrier spacing are inversely related. The number of bitscarried by each resource element may depend on the modulation scheme(e.g., the order of the modulation scheme, the coding rate of themodulation scheme, or both). Thus, the more resource elements that a UE115 receives and the higher the order of the modulation scheme, thehigher the data rate may be for the UE 115. A wireless communicationsresource may refer to a combination of a radio frequency spectrumresource, a time resource, and a spatial resource (e.g., spatial layersor beams), and the use of multiple spatial layers may further increasethe data rate or data integrity for communications with a UE 115.

One or more numerologies for a carrier may be supported, where anumerology may include a subcarrier spacing (Δf) and a cyclic prefix. Acarrier may be divided into one or more BWPs having the same ordifferent numerologies. In some examples, a UE 115 may be configuredwith multiple BWPs. In some examples, a single BWP for a carrier may beactive at a given time and communications for the UE 115 may berestricted to one or more active BWPs.

The time intervals for the base stations 105 or the UEs 115 may beexpressed in multiples of a basic time unit which may, for example,refer to a sampling period of T_(s)=1/(Δf_(max)·N_(f)) seconds, whereΔf_(max) may represent the maximum supported subcarrier spacing, andN_(f) may represent the maximum supported discrete Fourier transform(DFT) size. Time intervals of a communications resource may be organizedaccording to radio frames each having a specified duration (e.g., 10milliseconds (ms)). Each radio frame may be identified by a system framenumber (SFN) (e.g., ranging from 0 to 1023).

Each frame may include multiple consecutively numbered subframes orslots, and each subframe or slot may have the same duration. In someexamples, a frame may be divided (e.g., in the time domain) intosubframes, and each subframe may be further divided into a number ofslots. Alternatively, each frame may include a variable number of slots,and the number of slots may depend on subcarrier spacing. Each slot mayinclude a number of symbol periods (e.g., depending on the length of thecyclic prefix prepended to each symbol period). In some wirelesscommunications systems 100, a slot may further be divided into multiplemini-slots containing one or more symbols. Excluding the cyclic prefix,each symbol period may contain one or more (e.g., N_(f)) samplingperiods. The duration of a symbol period may depend on the subcarrierspacing or frequency band of operation.

A subframe, a slot, a mini-slot, or a symbol may be the smallestscheduling unit (e.g., in the time domain) of the wirelesscommunications system 100 and may be referred to as a transmission timeinterval (TTI). In some examples, the TTI duration (e.g., the number ofsymbol periods in a TTI) may be variable. Additionally, oralternatively, the smallest scheduling unit of the wirelesscommunications system 100 may be dynamically selected (e.g., in burstsof shortened TTIs (sTTIs)).

Physical channels may be multiplexed on a carrier according to varioustechniques. A physical control channel and a physical data channel maybe multiplexed on a downlink carrier, for example, using one or more oftime division multiplexing (TDM) techniques, frequency divisionmultiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A controlregion (e.g., a control resource set (CORESET)) for a physical controlchannel may be defined by a number of symbol periods and may extendacross the system bandwidth or a subset of the system bandwidth of thecarrier. One or more control regions (e.g., CORESETs) may be configuredfor a set of the UEs 115. For example, one or more of the UEs 115 maymonitor or search control regions for control information according toone or more search space sets, and each search space set may include oneor multiple control channel candidates in one or more aggregation levelsarranged in a cascaded manner. An aggregation level for a controlchannel candidate may refer to a number of control channel resources(e.g., control channel elements (CCEs)) associated with encodedinformation for a control information format having a given payloadsize. Search space sets may include common search space sets configuredfor sending control information to multiple UEs 115 and UE-specificsearch space sets for sending control information to a specific UE 115.

Each base station 105 may provide communication coverage via one or morecells, for example a macro cell, a small cell, a hot spot, or othertypes of cells, or any combination thereof. The term “cell” may refer toa logical communication entity used for communication with a basestation 105 (e.g., over a carrier) and may be associated with anidentifier for distinguishing neighboring cells (e.g., a physical cellidentifier (PCID), a virtual cell identifier (VCID), or others). In someexamples, a cell may also refer to a geographic coverage area 110 or aportion of a geographic coverage area 110 (e.g., a sector) over whichthe logical communication entity operates. Such cells may range fromsmaller areas (e.g., a structure, a subset of structure) to larger areasdepending on various factors such as the capabilities of the basestation 105. For example, a cell may be or include a building, a subsetof a building, or exterior spaces between or overlapping with geographiccoverage areas 110, among other examples.

A macro cell generally covers a relatively large geographic area (e.g.,several kilometers in radius) and may allow unrestricted access by theUEs 115 with service subscriptions with the network provider supportingthe macro cell. A small cell may be associated with a lower-powered basestation 105, as compared with a macro cell, and a small cell may operatein the same or different (e.g., licensed, unlicensed) frequency bands asmacro cells. Small cells may provide unrestricted access to the UEs 115with service subscriptions with the network provider or may providerestricted access to the UEs 115 having an association with the smallcell (e.g., the UEs 115 in a closed subscriber group (CSG), the UEs 115associated with users in a home or office). A base station 105 maysupport one or multiple cells and may also support communications overthe one or more cells using one or multiple component carriers.

In some examples, a carrier may support multiple cells, and differentcells may be configured according to different protocol types (e.g.,MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that mayprovide access for different types of devices.

In some examples, a base station 105 may be movable and thereforeprovide communication coverage for a moving geographic coverage area110. In some examples, different geographic coverage areas 110associated with different technologies may overlap, but the differentgeographic coverage areas 110 may be supported by the same base station105. In other examples, the overlapping geographic coverage areas 110associated with different technologies may be supported by differentbase stations 105. The wireless communications system 100 may include,for example, a heterogeneous network in which different types of thebase stations 105 provide coverage for various geographic coverage areas110 using the same or different radio access technologies.

The wireless communications system 100 may support synchronous orasynchronous operation. For synchronous operation, the base stations 105may have similar frame timings, and transmissions from different basestations 105 may be approximately aligned in time. For asynchronousoperation, the base stations 105 may have different frame timings, andtransmissions from different base stations 105 may, in some examples,not be aligned in time. The techniques described herein may be used foreither synchronous or asynchronous operations.

Some UEs 115, such as MTC or IoT devices, may be low cost or lowcomplexity devices and may provide for automated communication betweenmachines (e.g., via Machine-to-Machine (M2M) communication). M2Mcommunication or MTC may refer to data communication technologies thatallow devices to communicate with one another or a base station 105without human intervention. In some examples, M2M communication or MTCmay include communications from devices that integrate sensors or metersto measure or capture information and relay such information to acentral server or application program that makes use of the informationor presents the information to humans interacting with the applicationprogram. Some UEs 115 may be designed to collect information or enableautomated behavior of machines or other devices. Examples ofapplications for MTC devices include smart metering, inventorymonitoring, water level monitoring, equipment monitoring, healthcaremonitoring, wildlife monitoring, weather and geological eventmonitoring, fleet management and tracking, remote security sensing,physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ operating modes that reducepower consumption, such as half-duplex communications (e.g., a mode thatsupports one-way communication via transmission or reception, but nottransmission and reception simultaneously). In some examples,half-duplex communications may be performed at a reduced peak rate.Other power conservation techniques for the UEs 115 include entering apower saving deep sleep mode when not engaging in active communications,operating over a limited bandwidth (e.g., according to narrowbandcommunications), or a combination of these techniques. For example, someUEs 115 may be configured for operation using a narrowband protocol typethat is associated with a defined portion or range (e.g., set ofsubcarriers or resource blocks (RBs)) within a carrier, within aguard-band of a carrier, or outside of a carrier.

The wireless communications system 100 may be configured to supportultra-reliable communications or low-latency communications, or variouscombinations thereof. For example, the wireless communications system100 may be configured to support ultra-reliable low-latencycommunications (URLLC) or mission critical communications. The UEs 115may be designed to support ultra-reliable, low-latency, or criticalfunctions (e.g., mission critical functions). Ultra-reliablecommunications may include private communication or group communicationand may be supported by one or more mission critical services such asmission critical push-to-talk (MCPTT), mission critical video (MCVideo),or mission critical data (MCData). Support for mission criticalfunctions may include prioritization of services, and mission criticalservices may be used for public safety or general commercialapplications. The terms ultra-reliable, low-latency, mission critical,and ultra-reliable low-latency may be used interchangeably herein.

In some examples, a UE 115 may also be able to communicate directly withother UEs 115 over a device-to-device (D2D) communication link 135(e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115utilizing D2D communications may be within the geographic coverage area110 of a base station 105. Other UEs 115 in such a group may be outsidethe geographic coverage area 110 of a base station 105 or be otherwiseunable to receive transmissions from a base station 105. In someexamples, groups of the UEs 115 communicating via D2D communications mayutilize a one-to-many (1:M) system in which each UE 115 transmits toevery other UE 115 in the group. In some examples, a base station 105facilitates the scheduling of resources for D2D communications. In othercases, D2D communications are carried out between the UEs 115 withoutthe involvement of a base station 105.

In some systems, the D2D communication link 135 may be an example of acommunication channel, such as a sidelink communication channel, betweenvehicles (e.g., UEs 115). In some examples, vehicles may communicateusing vehicle-to-everything (V2X) communications, vehicle-to-vehicle(V2V) communications, or some combination of these. A vehicle may signalinformation related to traffic conditions, signal scheduling, weather,safety, emergencies, or any other information relevant to a V2X system.In some examples, vehicles in a V2X system may communicate with roadsideinfrastructure, such as roadside units, or with the network via one ormore network nodes (e.g., base stations 105) using vehicle-to-network(V2N) communications, or with both.

The core network 130 may provide user authentication, accessauthorization, tracking, Internet Protocol (IP) connectivity, and otheraccess, routing, or mobility functions. The core network 130 may be anevolved packet core (EPC) or 5G core (5GC), which may include at leastone control plane entity that manages access and mobility (e.g., amobility management entity (MIME), an access and mobility managementfunction (AMF)) and at least one user plane entity that routes packetsor interconnects to external networks (e.g., a serving gateway (S-GW), aPacket Data Network (PDN) gateway (P-GW), or a user plane function(UPF)). The control plane entity may manage non-access stratum (NAS)functions such as mobility, authentication, and bearer management forthe UEs 115 served by the base stations 105 associated with the corenetwork 130. User IP packets may be transferred through the user planeentity, which may provide IP address allocation as well as otherfunctions. The user plane entity may be connected to the networkoperators IP services 150. The network operators IP services 150 mayinclude access to the Internet, Intranet(s), an IP Multimedia Subsystem(IMS), or a Packet-Switched Streaming Service.

Some of the network devices, such as a base station 105, may includesubcomponents such as an access network entity 140, which may be anexample of an access node controller (ANC). Each access network entity140 may communicate with the UEs 115 through one or more other accessnetwork transmission entities 145, which may be referred to as radioheads, smart radio heads, or transmission/reception points (TRPs). Eachaccess network transmission entity 145 may include one or more antennapanels. In some configurations, various functions of each access networkentity 140 or base station 105 may be distributed across various networkdevices (e.g., radio heads and ANCs) or consolidated into a singlenetwork device (e.g., a base station 105).

The wireless communications system 100 may operate using one or morefrequency bands, which may include the range of 300 megahertz (MHz) to300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz isknown as the ultra-high frequency (UHF) region or decimeter band becausethe wavelengths range from approximately one decimeter to one meter inlength. The UHF waves may be blocked or redirected by buildings andenvironmental features, but the waves may penetrate structuressufficiently for a macro cell to provide service to the UEs 115 locatedindoors. The transmission of UHF waves may be associated with smallerantennas and shorter ranges (e.g., less than 100 kilometers) compared totransmission using the smaller frequencies and longer waves of the highfrequency (HF) or very high frequency (VHF) portion of the spectrumbelow 300 MHz.

The wireless communications system 100 may also operate in a super highfrequency (SHF) region using frequency bands from 3 GHz to 30 GHz, alsoknown as the centimeter band, or in an extremely high frequency (EHF)region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as themillimeter band. In some examples, the wireless communications system100 may support millimeter wave (mmW) communications between the UEs 115and the base stations 105, and EHF antennas of the respective devicesmay be smaller and more closely spaced than UHF antennas. In someexamples, this may facilitate use of antenna arrays within a device. Thepropagation of EHF transmissions, however, may be subject to evengreater atmospheric attenuation and shorter range than SHF or UHFtransmissions. The techniques disclosed herein may be employed acrosstransmissions that use one or more different frequency regions, anddesignated use of bands across these frequency regions may differ bycountry or regulating body.

The wireless communications system 100 may utilize both licensed andunlicensed radio frequency spectrum bands. For example, the wirelesscommunications system 100 may employ License Assisted Access (LAA),LTE-Unlicensed (LTE-U) radio access technology, or NR technology in anunlicensed band such as the 5 GHz industrial, scientific, and medical(ISM) band. When operating in unlicensed radio frequency spectrum bands,devices such as the base stations 105 and the UEs 115 may employ carriersensing for collision detection and avoidance. In some examples,operations in unlicensed bands may be based on a carrier aggregationconfiguration in conjunction with component carriers operating in alicensed band (e.g., LAA). Operations in unlicensed spectrum may includedownlink transmissions, uplink transmissions, P2P transmissions, or D2Dtransmissions, among other examples.

A base station 105 or a UE 115 may be equipped with multiple antennas,which may be used to employ techniques such as transmit diversity,receive diversity, multiple-input multiple-output (MIMO) communications,or beamforming. The antennas of a base station 105 or a UE 115 may belocated within one or more antenna arrays or antenna panels, which maysupport MIMO operations or transmit or receive beamforming. For example,one or more base station antennas or antenna arrays may be co-located atan antenna assembly, such as an antenna tower. In some examples,antennas or antenna arrays associated with a base station 105 may belocated in diverse geographic locations. A base station 105 may have anantenna array with a number of rows and columns of antenna ports thatthe base station 105 may use to support beamforming of communicationswith a UE 115. Likewise, a UE 115 may have one or more antenna arraysthat may support various MIMO or beamforming operations. Additionally,or alternatively, an antenna panel may support radio frequencybeamforming for a signal transmitted via an antenna port.

The base stations 105 or the UEs 115 may use MIMO communications toexploit multipath signal propagation and increase the spectralefficiency by transmitting or receiving multiple signals via differentspatial layers. Such techniques may be referred to as spatialmultiplexing. The multiple signals may, for example, be transmitted bythe transmitting device via different antennas or different combinationsof antennas. Likewise, the multiple signals may be received by thereceiving device via different antennas or different combinations ofantennas. Each of the multiple signals may be referred to as a separatespatial stream and may carry bits associated with the same data stream(e.g., the same codeword) or different data streams (e.g., differentcodewords). Different spatial layers may be associated with differentantenna ports used for channel measurement and reporting. MIMOtechniques include single-user MIMO (SU-MIMO), where multiple spatiallayers are transmitted to the same receiving device, and multiple-userMIMO (MU-MIMO), where multiple spatial layers are transmitted tomultiple devices.

Beamforming, which may also be referred to as spatial filtering,directional transmission, or directional reception, is a signalprocessing technique that may be used at a transmitting device or areceiving device (e.g., a base station 105, a UE 115) to shape or steeran antenna beam (e.g., a transmit beam, a receive beam) along a spatialpath between the transmitting device and the receiving device.Beamforming may be achieved by combining the signals communicated viaantenna elements of an antenna array such that some signals propagatingat particular orientations with respect to an antenna array experienceconstructive interference while others experience destructiveinterference. The adjustment of signals communicated via the antennaelements may include a transmitting device or a receiving deviceapplying amplitude offsets, phase offsets, or both to signals carriedvia the antenna elements associated with the device. The adjustmentsassociated with each of the antenna elements may be defined by abeamforming weight set associated with a particular orientation (e.g.,with respect to the antenna array of the transmitting device orreceiving device, or with respect to some other orientation).

A base station 105 or a UE 115 may use beam sweeping techniques as partof beam forming operations. For example, a base station 105 may usemultiple antennas or antenna arrays (e.g., antenna panels) to conductbeamforming operations for directional communications with a UE 115.Some signals (e.g., synchronization signals, reference signals, beamselection signals, or other control signals) may be transmitted by abase station 105 multiple times in different directions. For example,the base station 105 may transmit a signal according to differentbeamforming weight sets associated with different directions oftransmission. Transmissions in different beam directions may be used toidentify (e.g., by a transmitting device, such as a base station 105, orby a receiving device, such as a UE 115) a beam direction for latertransmission or reception by the base station 105.

Some signals, such as data signals associated with a particularreceiving device, may be transmitted by a base station 105 in a singlebeam direction (e.g., a direction associated with the receiving device,such as a UE 115). In some examples, the beam direction associated withtransmissions along a single beam direction may be determined based on asignal that was transmitted in one or more beam directions. For example,a UE 115 may receive one or more of the signals transmitted by the basestation 105 in different directions and may report to the base station105 an indication of the signal that the UE 115 received with a highestsignal quality or an otherwise acceptable signal quality.

In some examples, transmissions by a device (e.g., by a base station 105or a UE 115) may be performed using multiple beam directions, and thedevice may use a combination of digital precoding or radio frequencybeamforming to generate a combined beam for transmission (e.g., from abase station 105 to a UE 115). The UE 115 may report feedback thatindicates precoding weights for one or more beam directions, and thefeedback may correspond to a configured number of beams across a systembandwidth or one or more sub-bands. The base station 105 may transmit areference signal (e.g., a cell-specific reference signal (CRS), achannel state information reference signal (CSI-RS)), which may beprecoded or unprecoded. The UE 115 may provide feedback for beamselection, which may be a precoding matrix indicator (PMI) orcodebook-based feedback (e.g., a multi-panel type codebook, a linearcombination type codebook, a port selection type codebook). Althoughthese techniques are described with reference to signals transmitted inone or more directions by a base station 105, a UE 115 may employsimilar techniques for transmitting signals multiple times in differentdirections (e.g., for identifying a beam direction for subsequenttransmission or reception by the UE 115) or for transmitting a signal ina single direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g., a UE 115) may try multiple receiveconfigurations (e.g., directional listening) when receiving varioussignals from the base station 105, such as synchronization signals,reference signals, beam selection signals, or other control signals. Forexample, a receiving device may try multiple receive directions byreceiving via different antenna subarrays, by processing receivedsignals according to different antenna subarrays, by receiving accordingto different receive beamforming weight sets (e.g., differentdirectional listening weight sets) applied to signals received atmultiple antenna elements of an antenna array, or by processing receivedsignals according to different receive beamforming weight sets appliedto signals received at multiple antenna elements of an antenna array,any of which may be referred to as “listening” according to differentreceive configurations or receive directions. In some examples, areceiving device may use a single receive configuration to receive alonga single beam direction (e.g., when receiving a data signal). The singlereceive configuration may be aligned in a beam direction determinedbased on listening according to different receive configurationdirections (e.g., a beam direction determined to have a highest signalstrength, highest signal-to-noise ratio (SNR), or otherwise acceptablesignal quality based on listening according to multiple beamdirections).

The wireless communications system 100 may be a packet-based networkthat operates according to a layered protocol stack. In the user plane,communications at the bearer or Packet Data Convergence Protocol (PDCP)layer may be IP-based. A Radio Link Control (RLC) layer may performpacket segmentation and reassembly to communicate over logical channels.A Medium Access Control (MAC) layer may perform priority handling andmultiplexing of logical channels into transport channels. The MAC layermay also use error detection techniques, error correction techniques, orboth to support retransmissions at the MAC layer to improve linkefficiency. In the control plane, the Radio Resource Control (RRC)protocol layer may provide establishment, configuration, and maintenanceof an RRC connection between a UE 115 and a base station 105 or a corenetwork 130 supporting radio bearers for user plane data. At thephysical layer, transport channels may be mapped to physical channels.

The UEs 115 and the base stations 105 may support retransmissions ofdata to increase the likelihood that data is received successfully.Hybrid automatic repeat request (HARQ) feedback is one technique forincreasing the likelihood that data is received correctly over acommunication link 125. HARQ may include a combination of errordetection (e.g., using a cyclic redundancy check (CRC)), forward errorcorrection (FEC), and retransmission (e.g., automatic repeat request(ARQ)). HARQ may improve throughput at the MAC layer in poor radioconditions (e.g., low signal-to-noise conditions). In some examples, adevice may support same-slot HARQ feedback, where the device may provideHARQ feedback in a specific slot for data received in a previous symbolin the slot. In other cases, the device may provide HARQ feedback in asubsequent slot, or according to some other time interval.

In some cases, a UE 115 may determine a reaction to a cancellationindication received from a base station 105, in particular a reaction atthe PHY or MAC layers. For instance, the UE 115 may determine how toperform power control calculations, intra-UE multiplexing, and new dataindicator counting based on the cancellation indication. For example, aUE 115 may receive a grant, from the base station 105, for a firsttransmission associated with a first transmission parameter scheduled ona first set of resources. The base station 105 may later determine thata different transmission from the first transmission may be scheduled ona set of resources at least partially overlapping the first set ofresources. For example, a higher priority transmission than the firsttransmission may be scheduled. The base station 105 may generate andtransmit a cancellation indication for the UE 115 based on the highpriority transmission being scheduled. The UE 115 may receive thecancellation indication, and the UE 115 may drop at least a portion ofthe first transmission based on receiving the indication. The UE 115 mayalso determine a second transmission parameter for a second transmissionscheduled subsequent to the first transmission based at least in part onthe first transmission parameter and irrespective of dropping the firsttransmission, and the UE 115 may transmit or receive the secondtransmission according to the second transmission parameter. Thus, thecancellation indication may be applied at the UE 115 after the MAC andPHY layer procedures are complete and may not change previousprocedures.

Additionally, or alternatively, a UE 115 may receive a first grant for afirst transmission scheduled for a first set of resources as well as asecond grant for a second transmission scheduled for a second set ofresources that overlaps with the first set of resources. The UE 115 mayfollow an intra-UE multiplexing conflict resolution, which may result inthe UE 115 dropping at least a portion of the first transmission basedon receiving the second grant. A base station 105 may determine that adifferent transmission from the first or second transmissions may bescheduled on a set of resources at least partially overlapping thesecond set of resources. For example, a higher priority transmissionthan the second transmission (e.g., a dynamically scheduledtransmission) may be scheduled. The base station 105 may generate andtransmit a cancellation indication to the UE 115 based on the highpriority transmission being scheduled. After dropping a portion of thefirst transmission due to intra-UE multiplexing conflict resolution, theUE 115 may receive the cancellation indication from the base station 105to at least partially cancel the second transmission, and the UE 115 maydrop at least a portion of the second transmission. Although theconflict of the second transmission with the first transmission isresolved based on the cancellation indication, the UE 115 may refrainfrom rescheduling the first transmission on the first set of resources.Thus, the cancellation indication may be applied at the UE 115 after theMAC and PHY layer procedures are complete and may not change previousactions taken (e.g., for conflict resolution).

FIG. 2 illustrates an example of a wireless communications system 200that supports PHY layer and MAC layer operations following ULCI inaccordance with aspects of the present disclosure. In some examples,wireless communications system 200 may implement aspects of wirelesscommunications system 100. Wireless communications system 200 mayinclude UEs 115-a and 115-b, which may be examples of a UE 115, asdescribed with reference to FIG. 1 . UEs 115-a and 115-b may supportcancellation indication 210. Wireless communications system 200 maysupport new radio (NR) operation and may include base station 105-a,which may be an example of a base station 105, as described withreference to FIG. 1 .

In wireless communications system 200, the UE 115-a may be incommunication with base station 105-a via link 205-a. Base station 105-amay also be in communication with the UE 115-b via link 205-b. Wirelesscommunications system 200 may support dynamic time division duplexing(TDD) such that an OFDM symbol on link 205-a may be configured (e.g.,semi-statically configured via RRC) to be either uplink, downlink, orflexible. The semi-statically configured flexible symbols may beconverted to be uplink or downlink via either a dynamic slot-formatindicator (SFI) or a dynamic grant (e.g., DCI format0_1,1_1,0_0,1_0,0_2,1_2). The UE 115-a may be configured to transmit orreceive signals via RRC signaling on a set of symbols that are indicatedas flexible symbols. For example, UE 115-a may be configured (e.g., viaRRC) to transmit a physical uplink shared channel (PUSCH) (e.g., aconfigured grant PUSCH), a sounding reference signal (SRS), physicaluplink control channel (PUCCH), or physical random access channel(PRACH). In another example, the UE 115-a may be configured (e.g., viaRRC) to receive a physical downlink shared channel (PDSCH) or CSI-RS.

Base station 105-a may transmit a cancellation indication 210 to UE115-a via link 205-a. The cancellation indication 210 may instruct theUE 115-a to cancel at least a portion of a transmission (e.g., uplink ordownlink transmission). UE 115-a may perform procedures at the MAC layer215 or the PHY layer 220, or both, as if the transmission was performedand before the transmission was canceled by the cancellation indication210. Thus, the cancellation indication 210 may be applied at the UE115-a after the MAC layer 215 and PHY layer 220 procedures are completeand may not change previous actions taken.

By supporting cancellation indication 210, the UE 115-a may cancel atleast a portion of a transmission based on receiving the cancellationindication 210. In some examples, the cancellation indication 210 mayallow the base station 105-a to schedule one or more preemptivetransmissions (e.g., URLLC transmissions for UE 115-b) on resources thatwere previously allocated to lower priority transmission (e.g., eMBBtransmissions for UE 115-a). In the uplink, the base station 105-a mayuse the cancellation indication 210 (e.g., an uplink cancellationindication (ULCI) or an uplink preemption indication (ULPI)) to indicateto UE 115-a to cancel a part of its transmission (e.g., eMBBtransmissions for UE 115-a) that overlaps in time or frequency, or both,with the urgent transmission (e.g., URLLC transmissions for UE 115-b)from other users.

In some cases, the UE 115-a may be scheduled for full-duplexcommunication (i.e., scheduled to concurrently transmit and receive),but the UE 115-a may be constrained to half-duplex communications (i.e.,transmit and receive during different time periods). Thus, thecancellation indication 210 may be an indication for full-duplexcommunications at UE 115-a that the UE 115-a may drop a communication toremain in half-duplex operation. For example, the UE 115-a may drop aPUSCH, SRS, PRACH, or PUCCH transmission on semi-statically configuredflexible symbols, if the UE 115-a receives a dynamic SFI that indicatesthese symbols to be downlink or flexible. In another example, the UE115-a may drop a PUSCH or SRS transmission on semi-statically configuredflexible symbols, if the UE 115-a receives a DCI format (e.g., DCIformat 0_1,1_1,0_0,1_0,0_2,1_2) indicating that the UE 115-a may receiveCSI-RS or PDSCH on these symbols. In yet another example, the UE 115-amay drop a PDSCH or CSI-RS reception on as set of semi-staticallyconfigured flexible symbols, if the UE 115-a receives a dynamic SFI thatindicates these symbols to be uplink or flexible. In another example,the UE 115-a may drop a PDSCH or CSI-RS reception on a set ofsemi-statically configured flexible symbols, if the UE 115-a receives aDCI format (e.g., DCI format 0_1,1_1,0_0,1_0,0_2,1_2) indicating the UE115-a to transmit a PUSCH, PUCCH, SRS, or PRACH on at least one symbolin the set of symbols.

The cancellation indication 210 may be transmitted by base station 105-abefore the affected transmission is performed (e.g., eMBB PUSCHtransmission). UE 115-a may cancel the overlapping part of itstransmission after receiving the cancellation indication 210, hence thepreviously scheduled transmission may not interfere with the preemptivetransmission. With the original transmission canceled, UE 115-a maydetermine how the cancellation will impact the MAC layer 215 and PHYlayer 220 procedures for other transmissions at the UE 115-a. If the UE115-a cancels a PUSCH, an SRS, a PUCCH, or a PRACH transmission or ifthe UE 115-a cancels a PDSCH or a CSI-RS reception due to a half-duplexconstraint, then the UE 115-a behavior to transmit other uplinktransmissions or to receive other downlink transmissions or performingother MAC layer 215 or PHY layer 220 procedures may (e.g., shall) not bechanged due to these dropping events resulting from the cancellationindication 210. Thus, from the perspective of these MAC layer 215 or PHYlayer 220 procedures, the canceled transmission or reception isconsidered to have occurred.

As described herein, each transmission at the UE 115-a may be associatedwith transmission parameters. In some examples, the transmissionparameter of a transmission may be relative to a transmission parameterof a previous transmission. The transmission parameter may include powercontrol, intra-UE multiplexing, NDI counting, MAC PDU generation, andthe like. The cancellation indication 210 may cancel a previouslyscheduled transmission, however, the cancellation indication 210 may notimpact any other MAC layer 215 or PHY layer 220 behavior from the UE115-a. Therefore, if UE 115-a cancels a transmission (e.g., a PUSCH oran SRS) due to detection of the cancellation indication 210 (e.g., a DCIformat 2_4), then the UE 115-a may transmit or receive othertransmissions as if the cancellation indication 210 is not present. Forexample, the UE 115-a may perform other MAC layer 215 or PHY layer 220procedures that may not be affected by the cancellation indication 210.

FIG. 3 illustrates an example of a timeline 300 that supports PHY layerand MAC layer operations following ULCI in accordance with aspects ofthe present disclosure. In some examples, timeline 300 may implementaspects of wireless communications system 100 or 200, or both. Timeline300 may take place at a UE 115 and may include a number of grants 310(e.g., uplink or downlink grants) from a base station 105, where eachgrant 310 is associated with a communication 315.

The UE 115 may receive a cancellation indication for at least a portionof communication 315-b. The UE 115 may cancel at least a portion ofcommunication 315-b as shown by the “X” in FIG. 3 . The UE 115 droppingof communication 315-b may not impact other MAC layer or PHY layerprocedures for communications 315-a or 315-c.

In some cases, the UE 115 PHY layer procedures may include power controland PHR calculation. The cancellation indication may not impact UE 115behavior to calculate transmit power of uplink transmissions. Forexample, communication 315-a may be associated with a transmit power asa transmission parameter. Grant 310-b may include a transmit powercontrol parameter, delta 1, for communication 315-b, which may berelative to the transmit power of communication 315-a. Additionally, oralternatively, grant 310-c may include a transmit power controlparameter, delta 2, for communication 315-c, which may be relative tothe transmit power of communication 315-a and 315-b. For example, thetransmit power for communication 315-c may be calculated as theaccumulation of the transmit power of communication 315-a, delta 1, anddelta 2. If the communication 315-b is dropped due to a cancellationindication, then the cancellation indication may not impact the transmitpower control accumulation for communication 315-c, subsequent to thecanceled communication 315-b. Thus, the UE 115 may accumulate the powercontrol command indicated in the uplink or downlink grant 310-b, delta1, associated with the canceled communication 315-b (e.g., a canceledPUSCH or canceled SRS, or both). In some examples, the UE 115 maycalculate a power headroom report (PHR) to include on the transmit powerof a canceled communication (e.g., communication 315-b).

In another example, the UE 115 PHY layer procedures may include NDIcounting. The cancellation indication may not impact UE 115 behavior todetermine when an NDI indicator is toggled. For example, communication315-a may be associated with an NDI value (e.g., 0) as a transmissionparameter. Grant 310-b may include an NDI value (e.g., 1) forcommunication 315-b that indicates new data is present, which may bedetermined relative to the NDI value of communication 315-a. Also, grant310-c may include an NDI value (e.g., 1) for communication 315-c thatindicates no new data is present, which may be determined relative tothe NDI value of communication 315-b. If a UE 115 detects a cancellationindication to cancel communication 315-b (e.g., a PUSCH), where thecommunication 315-b is scheduled by grant 310-b (e.g., an uplink grantwith a HARQ process ID and a first NDI value), and the UE 115 detectsgrant 310-c (e.g., a second uplink grant) scheduling communication 315-c(e.g., a second PUSCH with the HARQ process ID and with a second NDIvalue), and no other uplink grant with the HARQ process ID is receivedbetween grant 310-b and 310-c, then the UE 115 may determine whether theNDI of grant 310-c is toggled or not based on the NDI value of grant310-b. For instance, if the NDI value of grant 310-c (e.g., 1) is equalto the NDI value of grant 310-b (e.g., 1), then the NDI of grant 310-cis not toggled. Otherwise, the NDI of grant 310-c is not equal to theNDI value of grant 310-b, and the NDI of grant 310-c is toggled. Thus,even though the communication 315-b is canceled, the NDI of grant 310-bmay still used to determine the NDI status of future communications withthe same HARQ process ID.

In another example, the UE 115 MAC layer procedures may include MAC PDUgeneration and HARQ buffer management. A MAC layer may processes grant310-b by generating a PDU and TB if a new TB is scheduled by the grant310-b, empty the HARQ buffer and fill-in the new TB, and determine abuffer status report (BSR) for a data buffer. A cancellation indicationreceived by the UE 115 may not impact the UE 115 behavior to generate aMAC PDU and manage HARQ buffer for the corresponding HARQ process. Forexample, if a new transport block (TB) is generated due to reception ofthe grant 310-b, then UE 115 may keep the new TB in a HARQ buffer.Buffer status may be determined based on the communication 315-bcorresponding to grant 310-b is performed (e.g., transmitted). The MAClayer may rely on a lower layer (e.g., the PHY layer) to retransmit theTB in order to compensate for the canceled communication 315-b (e.g.,PUSCH) transmission due to the cancellation indication.

In another example, the UE 115 PHY layer procedure may includedetermining a number of PDSCH receptions or PUSCH transmissionssupported in a slot at UE 115. In case some of the PDSCH receptions orPUSCH transmissions are canceled due to a half-duplex constraint, thecanceled PDSCH receptions or PUSCH transmissions may be counted as thesupported PDSCH receptions or PUSCH transmissions in the slot forcapability purposes. For example, if communications 315 are PUSCHtransmissions and the UE 115 reported a capability of three PUSCHtransmissions in a slot, then if communication 315-b is canceled by acancellation indication, the UE 115 is not expected to transmit anadditional PUSCH relative to the originally scheduled PUSCHtransmissions before the cancellation indication was received.

FIGS. 4A and 4B illustrate examples of a timeline 400 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. In some examples, timeline 400 may implementaspects of wireless communications system 100 or 200, or both. Timeline400 may take place at a UE 115 and may include a number ofcommunications 415.

FIG. 4A shows a timeline 400-a that may include a number ofcommunications 415, and in some cases, the communications 415 may be ondifferent component carriers (CCs) that overlap at least partially intime. In this example, a cancellation indication may be received thatcancels at least a portion of communication 415-a, however, thecancellation indication may not impact the UE 115 behavior to calculatePHR. For instance, if UE 115 is scheduled to transmit two communications415-a and 415-b (e.g., two PUSCHs) on two respective CCs, and the UE 115cancels communication 415-a due to detection of a cancellationindication, the PHR in the communications 415 is calculated by ignoringthe cancellation indication and by taking into account the power of bothcommunications 415-a and 415-b, which includes the canceledcommunication 415-a.

In another example, a UE 115 may have a downlink uplink schedulingconflict, for example, communication 415-a may be a dynamicallyscheduled uplink transmission and communication 415-b may be asemi-statically configured downlink transmission. In this examples, theUE 115 may cancel the communication 415-b (e.g., a semi-staticallyconfigured downlink transmission (e.g., semi-persistent scheduling (SPS)or CSI-RS)) by receiving another dynamically scheduled communication415-a (e.g., a PUSCH or A-SRS). In some cases, the dynamically scheduledcommunication 415-a may be canceled due to a cancellation indication. Inthis case, the UE 115 is not expected to receive the previouslysemi-statically configured communication 415-b (e.g., a downlinktransmission). For example, if the dynamically scheduled communication415-a is canceled due to a cancellation indication, then the UE 115 maynot change the previous cancellation of communication 415-b for downlinkuplink scheduling conflict based on the cancellation indicationresolving the downlink uplink scheduling conflict.

FIG. 4B shows a timeline 400-b that may include a grant 410 and a numberof communications 415-c and 415-d. Grant 410 may be associated withcommunication 415-c. In some cases, UE 115 may have a configured grant(CG) and dynamic grant (DG) conflict for communications 415-c and 415-d.If a communication 415-c (e.g., a PUSCH) is scheduled by a DG, the UE115 may cancel communication 415-d (e.g., a PUSCH) scheduled by a CG. Insome examples, the UE 115 may subsequently receive a cancellationindication that cancels communication 415-c (e.g., the DG PUSCH). Inthis example, the UE 115 is not expected to transmit communication 415-d(e.g., in the CG occasion) either. For example, if the dynamicallyscheduled communication 415-c is canceled due to a cancellationindication, then the UE 115 may not change the previous cancellation ofcommunication 415-d for CG and DG conflict based on the cancellationindication resolving the CG and DG conflict.

FIG. 5 illustrates an example of a process flow 500 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. In some examples, process flow 500 mayimplement aspects of wireless communications system 100 or 200, or both.Process flow 500 is shown as being implemented by a UE 115-c, which maybe an example of the UEs 115 as described with respect to FIGS. 1 and 2. For example, UE 115-c may be an example of UE 115-a of FIG. 2 .Process flow 500 is also shown as being implemented by base station105-b, which may be an example of the base station 105 as described withrespect to FIGS. 1 and 2 . For example, base station 105-b may be anexample of base station 105-a of FIG. 2 .

In the following description of the process flow 500, the operations ofUE 115-c and base station 105-b may occur in a different order than theexemplary order shown. Some illustrated operations may also be left outof the process flow 500, or other operations may be added to the processflow 500. It is to be understood that while UE 115-c and base station105-b are shown performing a number of the operations of process flow500, any wireless device may perform the operations shown.

At 505, base station 105-b may transmit and UE 115-c may receive a grantfor a first transmission scheduled for a first set of resources, thefirst transmission associated with a first transmission parameter.

At 510, base station 105-b may transmit and UE 115-c may receive a grantfor a second transmission scheduled for a second set of resources, thesecond transmission associated with a second transmission parameter.

At 515, UE 115-c may determine a transmission parameter for at least oneof the first transmission or the second transmission based at least inpart on the first grant and the second grant.

At 520, base station 105-b may identify a third transmission (e.g., afull-duplex or URLLC transmission) that at least partially overlaps withthe first transmission, and the base station 105-b may generate acancellation indication based on the third transmission.

At 525, base station 105-b may transmit and UE 115-c may receive anindication for the UE 115-c to at least partially cancel the firsttransmission associated with the grant received at 505.

At 530, UE 115-c may drop at least a portion of the first transmissionbased at least in part on receiving the indication at 525.

At 535, UE 115-c may determine a transmission parameter for at least oneof the first transmission or the second transmission based at least inpart on the first transmission parameter and/or irrespective of droppingthe first transmission. In some cases, this may include determining touse the parameter determined at 515 or refraining from changing theparameter determined at 515.

At 535, UE 115-c may perform or receive the second transmissionaccording to the second transmission parameter determined at 510 or 530.

FIG. 6 illustrates an example of a process flow 600 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. In some examples, process flow 600 mayimplement aspects of wireless communications system 100 or 200, or both.Process flow 600 is shown as being implemented by a UE 115-d, which maybe an example of the UEs 115 as described with respect to FIGS. 1 and 2. For example, UE 115-d may be an example of UE 115-a of FIG. 2 .Process flow 600 is also shown as being implemented by base station105-c, which may be an example of the base station 105 as described withrespect to FIGS. 1 and 2 . For example, base station 105-c may be anexample of base station 105-a of FIG. 2 .

In the following description of the process flow 600, the operations ofUE 115-d and base station 105-c may occur in a different order than theexemplary order shown. Some illustrated operations may also be left outof the process flow 600, or other operations may be added to the processflow 600. It is to be understood that while UE 115-d and base station105-c are shown performing a number of the operations of process flow600, any wireless device may perform the operations shown.

At 605, base station 105-c may transmit and UE 115-d may receive a grantfor a first transmission scheduled for a first set of resources, thefirst transmission associated with a first transmission parameter.

At 610, base station 105-c may transmit and UE 115-d may receive a grantfor a second transmission scheduled for a second set of resources thatoverlaps with the first set of resources, the first transmissionassociated with a first transmission parameter.

At 615, UE 115-d may drop at least a portion of the first transmissionassociated with the grant received at 605 based on receiving the secondgrant at 610 and the sets of resources overlapping.

At 620, base station 105-c may identify a third transmission (e.g., afull-duplex or URLLC transmission) that at least partially overlaps withthe first transmission, and the base station 105-c may and generate acancellation indication based on the third transmission.

At 625, base station 105-b may transmit and UE 115-c may receive anindication for the UE to at least partially cancel the secondtransmission associated with the grant received at 610.

At 630, UE 115-d may drop at least a portion of the second transmissionbased at on receiving the indication at 625.

At 635, UE 115-d may refrain from rescheduling the first transmissiondropped at 615 based on receiving the indication at 625 and irrespectiveof dropping the second transmission at 630.

FIG. 7 shows a block diagram 700 of a device 705 that supports PHY layerand MAC layer operations following ULCI in accordance with aspects ofthe present disclosure. The device 705 may be an example of aspects of aUE 115 as described herein. The device 705 may include a receiver 710, acommunications manager 715, and a transmitter 720. The device 705 mayalso include a processor. Each of these components may be incommunication with one another (e.g., via one or more buses).

The receiver 710 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to PHY layerand MAC layer operations following ULCI, etc.). Information may bepassed on to other components of the device 705. The receiver 710 may bean example of aspects of the transceiver 1020 described with referenceto FIG. 10 . The receiver 710 may utilize a single antenna or a set ofantennas.

The communications manager 715 may receive a grant for a firsttransmission scheduled for a first set of resources, the firsttransmission associated with a first transmission parameter, receive anindication for the UE to at least partially cancel the firsttransmission, drop at least a portion of the first transmission based onreceiving the indication, determine a second transmission parameter fora second transmission based on the first transmission parameter andirrespective of dropping the first transmission, and perform or receivethe second transmission according to the second transmission parameter.The communications manager 715 may also receive a first grant for afirst transmission scheduled for a first set of resources, receive asecond grant for a second transmission scheduled for a second set ofresources that overlaps with the first set of resources, drop at least aportion of the first transmission based on receiving the second grant,receive an indication for the UE to at least partially cancel the secondtransmission, drop at least a portion of the second transmission basedon receiving the indication, and refrain from rescheduling the firsttransmission on the first set of resources based on receiving theindication and irrespective of dropping the second transmission. Thecommunications manager 715 may be an example of aspects of thecommunications manager 1010 described herein.

The communications manager 715, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 715, or itssub-components may be executed by a general-purpose processor, a digitalsignal processor (DSP), an application-specific integrated circuit(ASIC), a field programmable gate array (FPGA) or other programmablelogic device, discrete gate or transistor logic, discrete hardwarecomponents, or any combination thereof designed to perform the functionsdescribed in the present disclosure.

The communications manager 715, or its sub-components, may be physicallylocated at various positions, including being distributed such thatportions of functions are implemented at different physical locations byone or more physical components. In some examples, the communicationsmanager 715, or its sub-components, may be a separate and distinctcomponent in accordance with various aspects of the present disclosure.In some examples, the communications manager 715, or its sub-components,may be combined with one or more other hardware components, including,but not limited to, an input/output (I/O) component, a transceiver, anetwork server, another computing device, one or more other componentsdescribed in the present disclosure, or a combination thereof inaccordance with various aspects of the present disclosure.

The transmitter 720 may transmit signals generated by other componentsof the device 705. In some examples, the transmitter 720 may becollocated with a receiver 710 in a transceiver module. For example, thetransmitter 720 may be an example of aspects of the transceiver 1020described with reference to FIG. 10 . The transmitter 720 may utilize asingle antenna or a set of antennas.

FIG. 8 shows a block diagram 800 of a device 805 that supports PHY layerand MAC layer operations following ULCI in accordance with aspects ofthe present disclosure. The device 805 may be an example of aspects of adevice 705, or a UE 115 as described herein. The device 805 may includea receiver 810, a communications manager 815, and a transmitter 860. Thedevice 805 may also include a processor. Each of these components may bein communication with one another (e.g., via one or more buses).

The receiver 810 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to PHY layerand MAC layer operations following ULCI, etc.). Information may bepassed on to other components of the device 805. The receiver 810 may bean example of aspects of the transceiver 1020 described with referenceto FIG. 10 . The receiver 810 may utilize a single antenna or a set ofantennas.

The communications manager 815 may be an example of aspects of thecommunications manager 715 as described herein. The communicationsmanager 815 may include a first grant manager 820, a cancellationindication component 825, a transmission dropping controller 830, atransmission parameter manager 835, a transmission performer 840, asecond grant manager 845, a collision resolution component 850, and arescheduling controller 855. The communications manager 815 may be anexample of aspects of the communications manager 1010 described herein.

The first grant manager 820 may receive a grant for a first transmissionscheduled for a first set of resources, the first transmissionassociated with a first transmission parameter. The cancellationindication component 825 may receive an indication for the UE to atleast partially cancel the first transmission. The transmission droppingcontroller 830 may drop at least a portion of the first transmissionbased on receiving the indication. The transmission parameter manager835 may determine a second transmission parameter for a secondtransmission based on the first transmission parameter and irrespectiveof dropping the first transmission. The transmission performer 840 mayperform or receive the second transmission according to the secondtransmission parameter.

The first grant manager 820 may receive a first grant for a firsttransmission scheduled for a first set of resources. The second grantmanager 845 may receive a second grant for a second transmissionscheduled for a second set of resources that overlaps with the first setof resources. The collision resolution component 850 may drop at least aportion of the first transmission based on receiving the second grant.The cancellation indication component 825 may receive an indication forthe UE to at least partially cancel the second transmission. Thetransmission dropping controller 830 may drop at least a portion of thesecond transmission based on receiving the indication. The reschedulingcontroller 855 may refrain from rescheduling the first transmission onthe first set of resources based on receiving the indication andirrespective of dropping the second transmission.

The transmitter 860 may transmit signals generated by other componentsof the device 805. In some examples, the transmitter 860 may becollocated with a receiver 810 in a transceiver module. For example, thetransmitter 860 may be an example of aspects of the transceiver 1020described with reference to FIG. 10 . The transmitter 860 may utilize asingle antenna or a set of antennas.

FIG. 9 shows a block diagram 900 of a communications manager 905 thatsupports PHY layer and MAC layer operations following ULCI in accordancewith aspects of the present disclosure. The communications manager 905may be an example of aspects of a communications manager 715, acommunications manager 815, or a communications manager 1010 describedherein. The communications manager 905 may include a first grant manager910, a cancellation indication component 915, a transmission droppingcontroller 920, a transmission parameter manager 925, a transmissionperformer 930, a transmit power calculator 935, a power headroomcalculator 940, a NDI controller 945, a PDU generator 950, a data bufferstatus component 955, a HARQ buffer manager 960, a transport blockmanager 965, a data buffer manager 970, a capability reporter 975, asecond grant manager 980, a collision resolution component 985, and arescheduling controller 990. Each of these modules may communicate,directly or indirectly, with one another (e.g., via one or more buses).

The first grant manager 910 may receive a grant for a first transmissionscheduled for a first set of resources, the first transmissionassociated with a first transmission parameter. In some examples, thefirst grant manager 910 may receive a first grant for a firsttransmission scheduled for a first set of resources. In some cases, theUE is configured for half duplex communications, and where the grantincludes radio resource control signaling for a set of flexible symbols.In some cases, the first transmission includes a physical uplink sharedchannel, physical uplink control channel, physical random accesschannel, a sounding reference signal, a physical downlink sharedchannel, or a channel state information reference signal.

The cancellation indication component 915 may receive an indication forthe UE to at least partially cancel the first transmission. In someexamples, the cancellation indication component 915 may receive anindication for the UE to at least partially cancel the secondtransmission. In some cases, the indication includes a slot formatindicator or downlink control information. In some cases, the indicationincludes an uplink cancellation indication.

The transmission dropping controller 920 may drop at least a portion ofthe first transmission based on receiving the indication. In someexamples, the transmission dropping controller 920 may drop at least aportion of the second transmission based on receiving the indication.

The transmission parameter manager 925 may determine a secondtransmission parameter for a second transmission based on the firsttransmission parameter and irrespective of dropping the firsttransmission.

The transmission performer 930 may perform or receive the secondtransmission according to the second transmission parameter. In someexamples, performing or receiving the second transmission may be basedon the determined toggle state of the new data indicator for the secondtransmission. In some examples, the transmission performer 930 mayperform or receive the second transmission according to the secondtransmission parameter based on the capability report irrespective ofdropping the first transmission. In some cases, the first transmissionand the second transmission include an uplink transmission, or the firsttransmission and the second transmission include a downlinktransmission.

In some examples, the transmission performer 930 may cancel reception ofthe first transmission irrespective of dropping the second transmission.In some examples, the transmission performer 930 may cancel transmissionof the first transmission irrespective of dropping the secondtransmission. In some cases, the first transmission includes asemi-statically configured downlink transmission and the secondtransmission includes a dynamically scheduled uplink transmission. Insome cases, the first transmission includes a first uplink transmissionand the second transmission includes a second uplink transmission, andwhere the first grant includes a configured grant and the second grantincludes a dynamic grant.

The transmit power calculator 935 may determine a first transmit powerfor the second transmission relative to a second transmit power of thefirst transmission indicated by the grant irrespective of dropping thefirst transmission, where the second transmission parameter for thesecond transmission is the first transmit power.

The power headroom calculator 940 may transmit a power headroom reportbased on the determined first transmit power and the second transmitpower irrespective of dropping the first transmission.

The NDI controller 945 may determine a toggle state of a new dataindicator for the second transmission irrespective of dropping the firsttransmission, where the second transmission parameter for the secondtransmission includes the toggle state of the new data indicator. Insome examples, the NDI controller 945 may determine the toggle state ofthe new data indicator for the second transmission is based on adifference between a first new data indicator associated with the firsttransmission indicated by the grant and a second new data indicatorassociated with the second transmission.

The PDU generator 950 may generate, at a media access control layer, aprotocol data unit based on receiving the grant.

The data buffer status component 955 may determine a buffer status of adata buffer at the media access control layer based on the first set ofresources and irrespective of dropping the first transmission.

The HARQ buffer manager 960 may transfer the protocol data unit from thedata buffer at the media access control layer to a hybrid automaticrepeat request buffer at a physical layer based on the first set ofresources and irrespective of dropping the first transmission.

The transport block manager 965 may store a transport block of theprotocol data unit in the hybrid automatic repeat request buffer at thephysical layer.

The data buffer manager 970 may refrain from restoring the protocol dataunit in the data buffer at the media access control layer irrespectiveof dropping the second transmission.

The capability reporter 975 may determine a capability report indicatinga number of receptions the UE is capable of receiving in a slot orindicating a number of transmissions the UE is capable of performing inthe slot.

The second grant manager 980 may receive a second grant for a secondtransmission scheduled for a second set of resources that overlaps withthe first set of resources.

The collision resolution component 985 may drop at least a portion ofthe first transmission based on receiving the second grant.

The rescheduling controller 990 may refrain from rescheduling the firsttransmission on the first set of resources based on receiving theindication and irrespective of dropping the second transmission.

FIG. 10 shows a diagram of a system 1000 including a device 1005 thatsupports PHY layer and MAC layer operations following ULCI in accordancewith aspects of the present disclosure. The device 1005 may be anexample of or include the components of device 705, device 805, or a UE115 as described herein. The device 1005 may include components forbi-directional voice and data communications including components fortransmitting and receiving communications, including a communicationsmanager 1010, an I/O controller 1015, a transceiver 1020, an antenna1025, memory 1030, and a processor 1040. These components may be inelectronic communication via one or more buses (e.g., bus 1045).

The communications manager 1010 may receive a grant for a firsttransmission scheduled for a first set of resources, the firsttransmission associated with a first transmission parameter, receive anindication for the UE to at least partially cancel the firsttransmission, drop at least a portion of the first transmission based onreceiving the indication, determine a second transmission parameter fora second transmission based on the first transmission parameter andirrespective of dropping the first transmission, and perform or receivethe second transmission according to the second transmission parameter.The communications manager 1010 may also receive a first grant for afirst transmission scheduled for a first set of resources, receive asecond grant for a second transmission scheduled for a second set ofresources that overlaps with the first set of resources, drop at least aportion of the first transmission based on receiving the second grant,receive an indication for the UE to at least partially cancel the secondtransmission, drop at least a portion of the second transmission basedon receiving the indication, and refrain from rescheduling the firsttransmission on the first set of resources based on receiving theindication and irrespective of dropping the second transmission.

The I/O controller 1015 may manage input and output signals for thedevice 1005. The I/O controller 1015 may also manage peripherals notintegrated into the device 1005. In some cases, the I/O controller 1015may represent a physical connection or port to an external peripheral.In some cases, the I/O controller 1015 may utilize an operating systemsuch as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, oranother known operating system. In other cases, the I/O controller 1015may represent or interact with a modem, a keyboard, a mouse, atouchscreen, or a similar device. In some cases, the I/O controller 1015may be implemented as part of a processor. In some cases, a user mayinteract with the device 1005 via the I/O controller 1015 or viahardware components controlled by the I/O controller 1015.

The transceiver 1020 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described herein. For example, thetransceiver 1020 may represent a wireless transceiver and maycommunicate bi-directionally with another wireless transceiver. Thetransceiver 1020 may also include a modem to modulate the packets andprovide the modulated packets to the antennas for transmission, and todemodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 1025.However, in some cases the device may have more than one antenna 1025,which may be capable of concurrently transmitting or receiving multiplewireless transmissions.

The memory 1030 may include RAM and ROM. The memory 1030 may storecomputer-readable, computer-executable code 1035 including instructionsthat, when executed, cause the processor to perform various functionsdescribed herein. In some cases, the memory 1030 may contain, amongother things, a basic input/output system (BIOS) which may control basichardware or software operation such as the interaction with peripheralcomponents or devices.

The processor 1040 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 1040 may be configured to operate a memoryarray using a memory controller. In other cases, a memory controller maybe integrated into the processor 1040. The processor 1040 may beconfigured to execute computer-readable instructions stored in a memory(e.g., the memory 1030) to cause the device 1005 to perform variousfunctions (e.g., functions or tasks supporting PHY layer and MAC layeroperations following ULCI).

The code 1035 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunications. The code 1035 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 1035 may not be directly executable by theprocessor 1040, but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 11 shows a block diagram 1100 of a device 1105 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. The device 1105 may be an example of aspectsof a base station 105 as described herein. The device 1105 may include areceiver 1110, a communications manager 1115, and a transmitter 1120.The device 1105 may also include a processor. Each of these componentsmay be in communication with one another (e.g., via one or more buses).

The receiver 1110 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to PHY layerand MAC layer operations following ULCI, etc.). Information may bepassed on to other components of the device 1105. The receiver 1110 maybe an example of aspects of the transceiver 1420 described withreference to FIG. 14 . The receiver 1110 may utilize a single antenna ora set of antennas.

The communications manager 1115 may transmit, to a UE, a grant for afirst transmission scheduled for a first set of resources, the firsttransmission associated with a first transmission parameter, transmit anindication for the UE to at least partially cancel the firsttransmission based on a second transmission scheduled for a second setof resources that overlaps with the first set of resources, determine asecond transmission parameter for a third transmission based on thefirst transmission parameter, and perform or receive the thirdtransmission according to the second transmission parameter. Thecommunications manager 1115 may also transmit a first grant for a firsttransmission scheduled for a first set of resources, transmit a secondgrant for a second transmission scheduled for a second set of resourcesthat overlaps with the first set of resources, transmit an indicationfor the UE to at least partially cancel the second transmission based ona third transmission scheduled for a third set of resources thatoverlaps with the second set of resources, and refrain from reschedulingthe first transmission on the first set of resources based ontransmitting the indication. The communications manager 1115 may be anexample of aspects of the communications manager 1410 described herein.

The communications manager 1115, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 1115, or itssub-components may be executed by a general-purpose processor, a DSP, anapplication-specific integrated circuit (ASIC), an FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described in the present disclosure.

The communications manager 1115, or its sub-components, may bephysically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations by one or more physical components. In some examples, thecommunications manager 1115, or its sub-components, may be a separateand distinct component in accordance with various aspects of the presentdisclosure. In some examples, the communications manager 1115, or itssub-components, may be combined with one or more other hardwarecomponents, including, but not limited to, an input/output (I/O)component, a transceiver, a network server, another computing device,one or more other components described in the present disclosure, or acombination thereof in accordance with various aspects of the presentdisclosure.

The transmitter 1120 may transmit signals generated by other componentsof the device 1105. In some examples, the transmitter 1120 may becollocated with a receiver 1110 in a transceiver module. For example,the transmitter 1120 may be an example of aspects of the transceiver1420 described with reference to FIG. 14 . The transmitter 1120 mayutilize a single antenna or a set of antennas.

FIG. 12 shows a block diagram 1200 of a device 1205 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. The device 1205 may be an example of aspectsof a device 1105, or a base station 105 as described herein. The device1205 may include a receiver 1210, a communications manager 1215, and atransmitter 1250. The device 1205 may also include a processor. Each ofthese components may be in communication with one another (e.g., via oneor more buses).

The receiver 1210 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to PHY layerand MAC layer operations following ULCI, etc.). Information may bepassed on to other components of the device 1205. The receiver 1210 maybe an example of aspects of the transceiver 1420 described withreference to FIG. 14 . The receiver 1210 may utilize a single antenna ora set of antennas.

The communications manager 1215 may be an example of aspects of thecommunications manager 1115 as described herein. The communicationsmanager 1215 may include a first grant manager 1220, a cancellationindication component 1225, a transmission parameter manager 1230, atransmission performer 1235, a second grant manager 1240, and arescheduling controller 1245. The communications manager 1215 may be anexample of aspects of the communications manager 1410 described herein.

The first grant manager 1220 may transmit, to a UE, a grant for a firsttransmission scheduled for a first set of resources, the firsttransmission associated with a first transmission parameter. Thecancellation indication component 1225 may transmit an indication forthe UE to at least partially cancel the first transmission based on asecond transmission scheduled for a second set of resources thatoverlaps with the first set of resources. The transmission parametermanager 1230 may determine a second transmission parameter for a thirdtransmission based on the first transmission parameter. The transmissionperformer 1235 may perform or receive the third transmission accordingto the second transmission parameter.

The first grant manager 1220 may transmit a first grant for a firsttransmission scheduled for a first set of resources. The second grantmanager 1240 may transmit a second grant for a second transmissionscheduled for a second set of resources that overlaps with the first setof resources. The cancellation indication component 1225 may transmit anindication for the UE to at least partially cancel the secondtransmission based on a third transmission scheduled for a third set ofresources that overlaps with the second set of resources. Therescheduling controller 1245 may refrain from rescheduling the firsttransmission on the first set of resources based on transmitting theindication.

The transmitter 1250 may transmit signals generated by other componentsof the device 1205. In some examples, the transmitter 1250 may becollocated with a receiver 1210 in a transceiver module. For example,the transmitter 1250 may be an example of aspects of the transceiver1420 described with reference to FIG. 14 . The transmitter 1250 mayutilize a single antenna or a set of antennas.

FIG. 13 shows a block diagram 1300 of a communications manager 1305 thatsupports PHY layer and MAC layer operations following ULCI in accordancewith aspects of the present disclosure. The communications manager 1305may be an example of aspects of a communications manager 1115, acommunications manager 1215, or a communications manager 1410 describedherein. The communications manager 1305 may include a first grantmanager 1310, a cancellation indication component 1315, a transmissionparameter manager 1320, a transmission performer 1325, a transmit powercalculator 1330, a power headroom calculator 1335, a new data identifier1340, a NDI controller 1345, a capability report manager 1350, a secondgrant manager 1355, and a rescheduling controller 1360. Each of thesemodules may communicate, directly or indirectly, with one another (e.g.,via one or more buses).

The first grant manager 1310 may transmit, to a UE, a grant for a firsttransmission scheduled for a first set of resources, the firsttransmission associated with a first transmission parameter. In someexamples, the first grant manager 1310 may transmit a first grant for afirst transmission scheduled for a first set of resources. In somecases, the UE is configured for half duplex communications, and wherethe grant includes radio resource control signaling for a set offlexible symbols. In some cases, the first transmission includes aphysical uplink shared channel, physical uplink control channel,physical random access channel, a sounding reference signal, a physicaldownlink shared channel, or a channel state information referencesignal.

The cancellation indication component 1315 may transmit an indicationfor the UE to at least partially cancel the first transmission based ona second transmission scheduled for a second set of resources thatoverlaps with the first set of resources. In some examples, thecancellation indication component 1315 may transmit an indication forthe UE to at least partially cancel the second transmission based on athird transmission scheduled for a third set of resources that overlapswith the second set of resources. In some cases, the indication includesa slot format indicator or downlink control information. In some cases,the indication includes an uplink cancellation indication.

The transmission parameter manager 1320 may determine a secondtransmission parameter for a third transmission based on the firsttransmission parameter.

The transmission performer 1325 may perform or receive the thirdtransmission according to the second transmission parameter. In someexamples, the transmission performer 1325 may perform or receive thethird transmission according to the second transmission parameter basedon the capability report irrespective of the indication. In some cases,the first transmission and the third transmission include an uplinktransmission and the second transmission includes a downlinktransmission, or the first transmission and the third transmissioninclude a downlink transmission and the second transmission includes anuplink transmission.

In some examples, the transmission performer 1325 may canceltransmission of the first transmission irrespective of the indication.In some examples, the transmission performer 1325 may cancel receptionof the first transmission irrespective of the indication. In some cases,the first transmission includes a semi-statically configured downlinktransmission and the second transmission includes a dynamicallyscheduled uplink transmission. In some cases, the first transmissionincludes a first uplink transmission and the second transmissionincludes a second uplink transmission, and where the first grantincludes a configured grant and the second grant includes a dynamicgrant.

The transmit power calculator 1330 may determine a first transmit powerfor the third transmission relative to a second transmit power of thefirst transmission indicated by the grant irrespective of theindication, where the second transmission parameter for the thirdtransmission is the first transmit power.

The power headroom calculator 1335 may receive a power headroom reportincluding a first transmit power of the first transmission and a secondtransmit power of the third transmission irrespective of the indication.

The new data identifier 1340 may determine whether the thirdtransmission includes new data with respect to the first transmissionirrespective of the indication.

The NDI controller 1345 may determine a toggle state of a new dataindicator for the third transmission based on determining whether thethird transmission includes the new data, where the second transmissionparameter for the third transmission includes the toggle state of thenew data indicator.

The capability report manager 1350 may receive a capability reportindicating a number of receptions that the UE is capable of receiving ina slot or indicating a number of transmissions the UE is capable ofperforming in the slot.

The second grant manager 1355 may transmit a second grant for a secondtransmission scheduled for a second set of resources that overlaps withthe first set of resources.

The rescheduling controller 1360 may refrain from rescheduling the firsttransmission on the first set of resources based on transmitting theindication.

FIG. 14 shows a diagram of a system 1400 including a device 1405 thatsupports PHY layer and MAC layer operations following ULCI in accordancewith aspects of the present disclosure. The device 1405 may be anexample of or include the components of device 1105, device 1205, or abase station 105 as described herein. The device 1405 may includecomponents for bi-directional voice and data communications includingcomponents for transmitting and receiving communications, including acommunications manager 1410, a network communications manager 1415, atransceiver 1420, an antenna 1425, memory 1430, a processor 1440, and aninter-station communications manager 1445. These components may be inelectronic communication via one or more buses (e.g., bus 1450).

The communications manager 1410 may transmit, to a UE, a grant for afirst transmission scheduled for a first set of resources, the firsttransmission associated with a first transmission parameter, transmit anindication for the UE to at least partially cancel the firsttransmission based on a second transmission scheduled for a second setof resources that overlaps with the first set of resources, determine asecond transmission parameter for a third transmission based on thefirst transmission parameter, and perform or receive the thirdtransmission according to the second transmission parameter. Thecommunications manager 1410 may also transmit a first grant for a firsttransmission scheduled for a first set of resources, transmit a secondgrant for a second transmission scheduled for a second set of resourcesthat overlaps with the first set of resources, transmit an indicationfor the UE to at least partially cancel the second transmission based ona third transmission scheduled for a third set of resources thatoverlaps with the second set of resources, and refrain from reschedulingthe first transmission on the first set of resources based ontransmitting the indication.

The network communications manager 1415 may manage communications withthe core network (e.g., via one or more wired backhaul links). Forexample, the network communications manager 1415 may manage the transferof data communications for client devices, such as one or more UEs 115.

The transceiver 1420 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described herein. For example, thetransceiver 1420 may represent a wireless transceiver and maycommunicate bi-directionally with another wireless transceiver. Thetransceiver 1420 may also include a modem to modulate the packets andprovide the modulated packets to the antennas for transmission, and todemodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 1425.However, in some cases the device may have more than one antenna 1425,which may be capable of concurrently transmitting or receiving multiplewireless transmissions.

The memory 1430 may include RAM, ROM, or a combination thereof. Thememory 1430 may store computer-readable code 1435 including instructionsthat, when executed by a processor (e.g., the processor 1440) cause thedevice to perform various functions described herein. In some cases, thememory 1430 may contain, among other things, a BIOS which may controlbasic hardware or software operation such as the interaction withperipheral components or devices.

The processor 1440 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 1440 may be configured to operate a memoryarray using a memory controller. In some cases, a memory controller maybe integrated into processor 1440. The processor 1440 may be configuredto execute computer-readable instructions stored in a memory (e.g., thememory 1430) to cause the device 1405 to perform various functions(e.g., functions or tasks supporting PHY layer and MAC layer operationsfollowing ULCI).

The inter-station communications manager 1445 may manage communicationswith other base station 105, and may include a controller or schedulerfor controlling communications with UEs 115 in cooperation with otherbase stations 105. For example, the inter-station communications manager1445 may coordinate scheduling for transmissions to UEs 115 for variousinterference mitigation techniques such as beamforming or jointtransmission. In some examples, the inter-station communications manager1445 may provide an X2 interface within an LTE/LTE-A wirelesscommunication network technology to provide communication between basestations 105.

The code 1435 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunications. The code 1435 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 1435 may not be directly executable by theprocessor 1440, but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 15 shows a flowchart illustrating a method 1500 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. The operations of method 1500 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1500 may be performed by acommunications manager as described with reference to FIGS. 7 through 10. In some examples, a UE may execute a set of instructions to controlthe functional elements of the UE to perform the functions describedherein. Additionally, or alternatively, a UE may perform aspects of thefunctions described herein using special-purpose hardware.

At 1505, the UE may receive a grant for a first transmission scheduledfor a first set of resources, the first transmission associated with afirst transmission parameter. The operations of 1505 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 1505 may be performed by a first grant manager asdescribed with reference to FIGS. 7 through 10 .

At 1510, the UE may receive an indication for the UE to at leastpartially cancel the first transmission. The operations of 1510 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1510 may be performed by a cancellationindication component as described with reference to FIGS. 7 through 10 .

At 1515, the UE may drop at least a portion of the first transmissionbased on receiving the indication. The operations of 1515 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1515 may be performed by a transmissiondropping controller as described with reference to FIGS. 7 through 10 .

At 1520, the UE may determine a second transmission parameter for asecond transmission based on the first transmission parameter andirrespective of dropping the first transmission. The operations of 1520may be performed according to the methods described herein. In someexamples, aspects of the operations of 1520 may be performed by atransmission parameter manager as described with reference to FIGS. 7through 10 .

At 1525, the UE may perform or receive the second transmission accordingto the second transmission parameter. The operations of 1525 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1525 may be performed by a transmissionperformer as described with reference to FIGS. 7 through 10 .

FIG. 16 shows a flowchart illustrating a method 1600 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. The operations of method 1600 may beimplemented by a base station 105 or its components as described herein.For example, the operations of method 1600 may be performed by acommunications manager as described with reference to FIGS. 11 through14 . In some examples, a base station may execute a set of instructionsto control the functional elements of the base station to perform thefunctions described herein. Additionally, or alternatively, a basestation may perform aspects of the functions described herein usingspecial-purpose hardware.

At 1605, the base station may transmit, to a UE, a grant for a firsttransmission scheduled for a first set of resources, the firsttransmission associated with a first transmission parameter. Theoperations of 1605 may be performed according to the methods describedherein. In some examples, aspects of the operations of 1605 may beperformed by a first grant manager as described with reference to FIGS.11 through 14 .

At 1610, the base station may transmit an indication for the UE to atleast partially cancel the first transmission based on a secondtransmission scheduled for a second set of resources that overlaps withthe first set of resources. The operations of 1610 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 1610 may be performed by a cancellation indicationcomponent as described with reference to FIGS. 11 through 14 .

At 1615, the base station may determine a second transmission parameterfor a third transmission based on the first transmission parameter. Theoperations of 1615 may be performed according to the methods describedherein. In some examples, aspects of the operations of 1615 may beperformed by a transmission parameter manager as described withreference to FIGS. 11 through 14 .

At 1620, the base station may perform or receive the third transmissionaccording to the second transmission parameter. The operations of 1620may be performed according to the methods described herein. In someexamples, aspects of the operations of 1620 may be performed by atransmission performer as described with reference to FIGS. 11 through14 .

FIG. 17 shows a flowchart illustrating a method 1700 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. The operations of method 1700 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1700 may be performed by acommunications manager as described with reference to FIGS. 7 through 10. In some examples, a UE may execute a set of instructions to controlthe functional elements of the UE to perform the functions describedherein. Additionally, or alternatively, a UE may perform aspects of thefunctions described herein using special-purpose hardware.

At 1705, the UE may receive a first grant for a first transmissionscheduled for a first set of resources. The operations of 1705 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1705 may be performed by a first grantmanager as described with reference to FIGS. 7 through 10 .

At 1710, the UE may receive a second grant for a second transmissionscheduled for a second set of resources that overlaps with the first setof resources. The operations of 1710 may be performed according to themethods described herein. In some examples, aspects of the operations of1710 may be performed by a second grant manager as described withreference to FIGS. 7 through 10 .

At 1715, the UE may drop at least a portion of the first transmissionbased on receiving the second grant. The operations of 1715 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1715 may be performed by a collisionresolution component as described with reference to FIGS. 7 through 10 .

At 1720, the UE may receive an indication for the UE to at leastpartially cancel the second transmission. The operations of 1720 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1720 may be performed by a cancellationindication component as described with reference to FIGS. 7 through 10 .

At 1725, the UE may drop at least a portion of the second transmissionbased on receiving the indication. The operations of 1725 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1725 may be performed by a transmissiondropping controller as described with reference to FIGS. 7 through 10 .

At 1730, the UE may refrain from rescheduling the first transmission onthe first set of resources based on receiving the indication andirrespective of dropping the second transmission. The operations of 1730may be performed according to the methods described herein. In someexamples, aspects of the operations of 1730 may be performed by arescheduling controller as described with reference to FIGS. 7 through10 .

FIG. 18 shows a flowchart illustrating a method 1800 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. The operations of method 1800 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1800 may be performed by acommunications manager as described with reference to FIGS. 7 through 10. In some examples, a UE may execute a set of instructions to controlthe functional elements of the UE to perform the functions describedherein. Additionally, or alternatively, a UE may perform aspects of thefunctions described herein using special-purpose hardware.

At 1805, the UE may receive a first grant for a first transmissionscheduled for a first set of resources. The operations of 1805 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1805 may be performed by a first grantmanager as described with reference to FIGS. 7 through 10 .

At 1810, the UE may receive a second grant for a second transmissionscheduled for a second set of resources that overlaps with the first setof resources. The operations of 1810 may be performed according to themethods described herein. In some examples, aspects of the operations of1810 may be performed by a second grant manager as described withreference to FIGS. 7 through 10 .

At 1815, the UE may drop at least a portion of the first transmissionbased on receiving the second grant. The operations of 1815 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1815 may be performed by a collisionresolution component as described with reference to FIGS. 7 through 10 .

At 1820, the UE may receive an indication for the UE to at leastpartially cancel the second transmission. The operations of 1820 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1820 may be performed by a cancellationindication component as described with reference to FIGS. 7 through 10 .

At 1825, the UE may drop at least a portion of the second transmissionbased on receiving the indication. The operations of 1825 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1825 may be performed by a transmissiondropping controller as described with reference to FIGS. 7 through 10 .

At 1830, the UE may refrain from rescheduling the first transmission onthe first set of resources based on receiving the indication andirrespective of dropping the second transmission. The operations of 1830may be performed according to the methods described herein. In someexamples, aspects of the operations of 1830 may be performed by arescheduling controller as described with reference to FIGS. 7 through10 .

At 1835, the UE may cancel reception of the first transmissionirrespective of dropping the second transmission. The operations of 1835may be performed according to the methods described herein. In someexamples, aspects of the operations of 1835 may be performed by atransmission performer as described with reference to FIGS. 7 through 10.

FIG. 19 shows a flowchart illustrating a method 1900 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. The operations of method 1900 may beimplemented by a UE 115 or its components as described herein. Forexample, the operations of method 1900 may be performed by acommunications manager as described with reference to FIGS. 7 through 10. In some examples, a UE may execute a set of instructions to controlthe functional elements of the UE to perform the functions describedherein. Additionally, or alternatively, a UE may perform aspects of thefunctions described herein using special-purpose hardware.

At 1905, the UE may receive a first grant for a first transmissionscheduled for a first set of resources. The operations of 1905 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1905 may be performed by a first grantmanager as described with reference to FIGS. 7 through 10 .

At 1910, the UE may receive a second grant for a second transmissionscheduled for a second set of resources that overlaps with the first setof resources. The operations of 1910 may be performed according to themethods described herein. In some examples, aspects of the operations of1910 may be performed by a second grant manager as described withreference to FIGS. 7 through 10 .

At 1915, the UE may drop at least a portion of the first transmissionbased on receiving the second grant. The operations of 1915 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1915 may be performed by a collisionresolution component as described with reference to FIGS. 7 through 10 .

At 1920, the UE may receive an indication for the UE to at leastpartially cancel the second transmission. The operations of 1920 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1920 may be performed by a cancellationindication component as described with reference to FIGS. 7 through 10 .

At 1925, the UE may drop at least a portion of the second transmissionbased on receiving the indication. The operations of 1925 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1925 may be performed by a transmissiondropping controller as described with reference to FIGS. 7 through 10 .

At 1930, the UE may refrain from rescheduling the first transmission onthe first set of resources based on receiving the indication andirrespective of dropping the second transmission. The operations of 1930may be performed according to the methods described herein. In someexamples, aspects of the operations of 1930 may be performed by arescheduling controller as described with reference to FIGS. 7 through10 .

At 1935, the UE may cancel transmission of the first transmissionirrespective of dropping the second transmission. The operations of 1935may be performed according to the methods described herein. In someexamples, aspects of the operations of 1935 may be performed by atransmission performer as described with reference to FIGS. 7 through 10.

FIG. 20 shows a flowchart illustrating a method 2000 that supports PHYlayer and MAC layer operations following ULCI in accordance with aspectsof the present disclosure. The operations of method 2000 may beimplemented by a base station 105 or its components as described herein.For example, the operations of method 2000 may be performed by acommunications manager as described with reference to FIGS. 11 through14 . In some examples, a base station may execute a set of instructionsto control the functional elements of the base station to perform thefunctions described herein. Additionally, or alternatively, a basestation may perform aspects of the functions described herein usingspecial-purpose hardware.

At 2005, the base station may transmit a first grant for a firsttransmission scheduled for a first set of resources. The operations of2005 may be performed according to the methods described herein. In someexamples, aspects of the operations of 2005 may be performed by a firstgrant manager as described with reference to FIGS. 11 through 14 .

At 2010, the base station may transmit a second grant for a secondtransmission scheduled for a second set of resources that overlaps withthe first set of resources. The operations of 2010 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 2010 may be performed by a second grant manager asdescribed with reference to FIGS. 11 through 14 .

At 2015, the base station may transmit an indication for the UE to atleast partially cancel the second transmission based on a thirdtransmission scheduled for a third set of resources that overlaps withthe second set of resources. The operations of 2015 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 2015 may be performed by a cancellation indicationcomponent as described with reference to FIGS. 11 through 14 .

At 2020, the base station may refrain from rescheduling the firsttransmission on the first set of resources based on transmitting theindication. The operations of 2020 may be performed according to themethods described herein. In some examples, aspects of the operations of2020 may be performed by a rescheduling controller as described withreference to FIGS. 11 through 14 .

The following provides an overview of aspects of the present disclosure:

Aspect 1: A method for wireless communications at a UE, comprising:receiving a grant for a first transmission scheduled for a first set ofresources, the first transmission associated with a first transmissionparameter; receiving an indication for the UE to at least partiallycancel the first transmission; dropping at least a portion of the firsttransmission based at least in part on receiving the indication;determining a second transmission parameter for a second transmissionbased at least in part on the first transmission parameter andirrespective of dropping the first transmission; and performing orreceiving the second transmission according to the second transmissionparameter.

Aspect 2: The method of aspect 1, wherein determining the secondtransmission parameter for the second transmission further comprises:determining a first transmit power for the second transmission relativeto a second transmit power of the first transmission indicated by thegrant irrespective of dropping the first transmission, wherein thesecond transmission parameter for the second transmission is the firsttransmit power.

Aspect 3: The method of aspect 2, further comprising: transmitting apower headroom report based at least in part on the determined firsttransmit power and the second transmit power irrespective of droppingthe first transmission.

Aspect 4: The method of any of aspects 1 through 3, wherein determiningthe second transmission parameter for the second transmission furthercomprises: determining a toggle state of a new data indicator for thesecond transmission irrespective of dropping the first transmission,wherein the second transmission parameter for the second transmissioncomprises the toggle state of the new data indicator; and whereinperforming or receiving the second transmission is based at least inpart on the determined toggle state of the new data indicator for thesecond transmission.

Aspect 5: The method of aspect 4, wherein determining the toggle stateof the new data indicator for the second transmission is based at leastin part on a difference between a first new data indicator associatedwith the first transmission indicated by the grant and a second new dataindicator associated with the second transmission.

Aspect 6: The method of any of aspects 1 through 5, further comprising:generating, at a media access control layer, a protocol data unit basedat least in part on receiving the grant; and determining a buffer statusof a data buffer at the media access control layer based at least inpart on the first set of resources and irrespective of dropping thefirst transmission.

Aspect 7: The method of aspect 6, wherein determining the buffer statusof the data buffer further comprises: transferring the protocol dataunit from the data buffer at the media access control layer to a hybridautomatic repeat request buffer at a physical layer based at least inpart on the first set of resources and irrespective of dropping thefirst transmission; storing a transport block of the protocol data unitin the hybrid automatic repeat request buffer at the physical layer; andrefraining from restoring the protocol data unit in the data buffer atthe media access control layer irrespective of dropping the secondtransmission.

Aspect 8: The method of any of aspects 1 through 7, further comprising:determining a capability report indicating a number of receptions the UEis capable of receiving in a slot or indicating a number oftransmissions the UE is capable of performing in the slot; andperforming or receiving the second transmission according to the secondtransmission parameter based at least in part on the capability reportirrespective of dropping the first transmission.

Aspect 9: The method of any of aspects 1 through 8, wherein the UE isconfigured for half duplex communications, and the grant comprises radioresource control signaling for a set of flexible symbols.

Aspect 10: The method of aspect 9, wherein the indication comprises aslot format indicator or downlink control information.

Aspect 11: The method of any of aspects 9 through 10, wherein the firsttransmission and the second transmission comprise an uplinktransmission, or the first transmission and the second transmissioncomprise a downlink transmission.

Aspect 12: The method of any of aspects 1 through 11, wherein the firsttransmission comprises a physical uplink shared channel, physical uplinkcontrol channel, physical random access channel, a sounding referencesignal, a physical downlink shared channel, or a channel stateinformation reference signal.

Aspect 13: The method of any of aspects 1 through 12, wherein theindication comprises an uplink cancellation indication.

Aspect 14: A method for wireless communications at a base station,comprising: transmitting, to a UE, a grant for a first transmissionscheduled for a first set of resources, the first transmissionassociated with a first transmission parameter; transmitting anindication for the UE to at least partially cancel the firsttransmission based at least in part on a second transmission scheduledfor a second set of resources that overlaps with the first set ofresources; determining a second transmission parameter for a thirdtransmission based at least in part on the first transmission parameter;and performing or receiving the third transmission according to thesecond transmission parameter.

Aspect 15: The method of aspect 14, wherein determining the secondtransmission parameter for the third transmission further comprises:determining a first transmit power for the third transmission relativeto a second transmit power of the first transmission indicated by thegrant irrespective of the indication, wherein the second transmissionparameter for the third transmission is the first transmit power.

Aspect 16: The method of any of aspects 14 through 15, furthercomprising: receiving a power headroom report comprising a firsttransmit power of the first transmission and a second transmit power ofthe third transmission irrespective of the indication.

Aspect 17: The method of any of aspects 14 through 16, whereindetermining the second transmission parameter for the third transmissionfurther comprises: determining whether the third transmission comprisesnew data with respect to the first transmission irrespective of theindication; and determining a toggle state of a new data indicator forthe third transmission based at least in part on determining whether thethird transmission comprises the new data, wherein the secondtransmission parameter for the third transmission comprises the togglestate of the new data indicator.

Aspect 18: The method of any of aspects 14 through 17, furthercomprising: receiving a capability report indicating a number ofreceptions that the UE is capable of receiving in a slot or indicating anumber of transmissions the UE is capable of performing in the slot; andperforming or receiving the third transmission according to the secondtransmission parameter based at least in part on the capability reportirrespective of the indication.

Aspect 19: The method of any of aspects 14 through 18, wherein the UE isconfigured for half duplex communications, and the grant comprises radioresource control signaling for a set of flexible symbols.

Aspect 20: The method of aspect 19, wherein the indication comprises aslot format indicator or downlink control information.

Aspect 21: The method of any of aspects 19 through 20, wherein the firsttransmission and the third transmission are uplink transmissions and thesecond transmission is a downlink transmission, or the firsttransmission and the third transmission are downlink transmissions andthe second transmission is an uplink transmission.

Aspect 22: The method of any of aspects 14 through 21, wherein the firsttransmission comprises a physical uplink shared channel, physical uplinkcontrol channel, physical random access channel, a sounding referencesignal, a physical downlink shared channel, or a channel stateinformation reference signal.

Aspect 23: The method of any of aspects 14 through 22, wherein theindication comprises an uplink cancellation indication.

Aspect 24: A method for wireless communications at a UE, comprising:receiving a first grant for a first transmission scheduled for a firstset of resources; receiving a second grant for a second transmissionscheduled for a second set of resources that overlaps with the first setof resources; dropping at least a portion of the first transmissionbased at least in part on receiving the second grant; receiving anindication for the UE to at least partially cancel the secondtransmission; dropping at least a portion of the second transmissionbased at least in part on receiving the indication; and refraining fromrescheduling the first transmission on the first set of resources basedat least in part on receiving the indication and irrespective ofdropping the second transmission.

Aspect 25: The method of aspect 24, wherein refraining from reschedulingthe first transmission further comprises: cancelling reception of thefirst transmission irrespective of dropping the second transmission.

Aspect 26: The method of aspect 25, wherein the first transmissioncomprises a semi-statically configured downlink transmission and thesecond transmission comprises a dynamically scheduled uplinktransmission.

Aspect 27: The method of any of aspects 24 through 26, whereinrefraining from rescheduling the first transmission further comprises:cancelling transmission of the first transmission irrespective ofdropping the second transmission.

Aspect 28: The method of aspect 27, wherein the first transmissioncomprises a first uplink transmission and the second transmissioncomprises a second uplink transmission, and the first grant comprises aconfigured grant and the second grant comprises a dynamic grant.

Aspect 29: The method of any of aspects 24 through 28, wherein theindication comprises an uplink cancellation indication.

Aspect 30: A method for wireless communications at a base station,comprising: transmitting a first grant for a first transmissionscheduled for a first set of resources; transmitting a second grant fora second transmission scheduled for a second set of resources thatoverlaps with the first set of resources; transmitting an indication forthe UE to at least partially cancel the second transmission based atleast in part on a third transmission scheduled for a third set ofresources that overlaps with the second set of resources; and refrainingfrom rescheduling the first transmission on the first set of resourcesbased at least in part on transmitting the indication.

Aspect 31: The method of aspect 30, wherein refraining from reschedulingthe first transmission further comprises: cancelling transmission of thefirst transmission irrespective of the indication.

Aspect 32: The method of aspect 31, wherein the first transmissioncomprises a semi-statically configured downlink transmission and thesecond transmission comprises a dynamically scheduled uplinktransmission.

Aspect 33: The method of any of aspects 30 through 32, whereinrefraining from rescheduling the first transmission further comprises:cancelling reception of the first transmission irrespective of theindication.

Aspect 34: The method of aspect 33, wherein the first transmissioncomprises a first uplink transmission and the second transmissioncomprises a second uplink transmission, and the first grant comprises aconfigured grant and the second grant comprises a dynamic grant.

Aspect 35: The method of any of aspects 30 through 34, wherein theindication comprises an uplink cancellation indication.

Aspect 36: An apparatus for wireless communications at a UE, comprisinga processor; memory coupled with the processor; and instructions storedin the memory and executable by the processor to cause the apparatus toperform a method of any of aspects 1 through 13.

Aspect 37: An apparatus for wireless communications at a UE, comprisingat least one means for performing a method of any of aspects 1 through13.

Aspect 38: A non-transitory computer-readable medium storing code forwireless communications at a UE, the code comprising instructionsexecutable by a processor to perform a method of any of aspects 1through 13.

Aspect 39: An apparatus for wireless communications at a base station,comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform a method of any of aspects 14 through 23.

Aspect 40: An apparatus for wireless communications at a base station,comprising at least one means for performing a method of any of aspects14 through 23.

Aspect 41: A non-transitory computer-readable medium storing code forwireless communications at a base station, the code comprisinginstructions executable by a processor to perform a method of any ofaspects 14 through 23.

Aspect 42: An apparatus for wireless communications at a UE, comprisinga processor; memory coupled with the processor; and instructions storedin the memory and executable by the processor to cause the apparatus toperform a method of any of aspects 24 through 29.

Aspect 43: An apparatus for wireless communications at a UE, comprisingat least one means for performing a method of any of aspects 24 through29.

Aspect 44: A non-transitory computer-readable medium storing code forwireless communications at a UE, the code comprising instructionsexecutable by a processor to perform a method of any of aspects 24through 29.

Aspect 45: An apparatus for wireless communications at a base station,comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform a method of any of aspects 30 through 35.

Aspect 46: An apparatus for wireless communications at a base station,comprising at least one means for performing a method of any of aspects30 through 35.

Aspect 47: A non-transitory computer-readable medium storing code forwireless communications at a base station, the code comprisinginstructions executable by a processor to perform a method of any ofaspects 30 through 35.

It should be noted that the methods described herein describe possibleimplementations, and that the operations and the steps may be rearrangedor otherwise modified and that other implementations are possible.Further, aspects from two or more of the methods may be combined.

Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may bedescribed for purposes of example, and LTE, LTE-A, LTE-A Pro, or NRterminology may be used in much of the description, the techniquesdescribed herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NRnetworks. For example, the described techniques may be applicable tovarious other wireless communications systems such as Ultra MobileBroadband (UMB), Institute of Electrical and Electronics Engineers(IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, aswell as other systems and radio technologies not explicitly mentionedherein.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the description may be represented byvoltages, currents, electromagnetic waves, magnetic fields or particles,optical fields or particles, or any combination thereof.

The various illustrative blocks and components described in connectionwith the disclosure herein may be implemented or performed with ageneral-purpose processor, a DSP, an ASIC, a CPU, an FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described herein. A general-purpose processor may be amicroprocessor, but in the alternative, the processor may be anyprocessor, controller, microcontroller, or state machine. A processormay also be implemented as a combination of computing devices (e.g., acombination of a DSP and a microprocessor, multiple microprocessors, oneor more microprocessors in conjunction with a DSP core, or any othersuch configuration).

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof. Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described herein may be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations.

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that may beaccessed by a general-purpose or special purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media mayinclude random-access memory (RAM), read-only memory (ROM), electricallyerasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROMor other optical disk storage, magnetic disk storage or other magneticstorage devices, or any other non-transitory medium that may be used tocarry or store desired program code means in the form of instructions ordata structures and that may be accessed by a general-purpose orspecial-purpose computer, or a general-purpose or special-purposeprocessor. Also, any connection is properly termed a computer-readablemedium. For example, if the software is transmitted from a website,server, or other remote source using a coaxial cable, fiber optic cable,twisted pair, digital subscriber line (DSL), or wireless technologiessuch as infrared, radio, and microwave, then the coaxial cable, fiberoptic cable, twisted pair, DSL, or wireless technologies such asinfrared, radio, and microwave are included in the definition ofcomputer-readable medium. Disk and disc, as used herein, include CD,laser disc, optical disc, digital versatile disc (DVD), floppy disk andBlu-ray disc where disks usually reproduce data magnetically, whilediscs reproduce data optically with lasers. Combinations of the aboveare also included within the scope of computer-readable media.

As used herein, including in the claims, “or” as used in a list of items(e.g., a list of items prefaced by a phrase such as “at least one of” or“one or more of”) indicates an inclusive list such that, for example, alist of at least one of A, B, or C means A or B or C or AB or AC or BCor ABC (i.e., A and B and C). Also, as used herein, the phrase “basedon” shall not be construed as a reference to a closed set of conditions.For example, an example step that is described as “based on condition A”may be based on both a condition A and a condition B without departingfrom the scope of the present disclosure. In other words, as usedherein, the phrase “based on” shall be construed in the same manner asthe phrase “based at least in part on.”

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label, or othersubsequent reference label.

The description set forth herein, in connection with the appendeddrawings, describes example configurations and does not represent allthe examples that may be implemented or that are within the scope of theclaims. The term “example” used herein means “serving as an example,instance, or illustration,” and not “preferred” or “advantageous overother examples.” The detailed description includes specific details forthe purpose of providing an understanding of the described techniques.These techniques, however, may be practiced without these specificdetails. In some instances, known structures and devices are shown inblock diagram form in order to avoid obscuring the concepts of thedescribed examples.

The description herein is provided to enable a person having ordinaryskill in the art to make or use the disclosure. Various modifications tothe disclosure will be apparent to a person having ordinary skill in theart, and the generic principles defined herein may be applied to othervariations without departing from the scope of the disclosure. Thus, thedisclosure is not limited to the examples and designs described herein,but is to be accorded the broadest scope consistent with the principlesand novel features disclosed herein.

What is claimed is:
 1. An apparatus for wireless communications at auser equipment (UE), comprising: a processor, memory coupled with theprocessor; and instructions stored in the memory and executable by theprocessor to cause the apparatus to: receive a first grant for a firsttransmission scheduled for a first set of resources; receive a secondgrant for a second transmission scheduled for a second set of resourcesthat overlaps with the first set of resources; drop at least a portionof the first transmission based at least in part on receiving the secondgrant; receive an indication for the UE to at least partially cancel thesecond transmission; drop at least a portion of the second transmissionbased at least in part on receiving the indication; and refrain fromrescheduling the first transmission on the first set of resources basedat least in part on receiving the indication and irrespective ofdropping the second transmission.
 2. The apparatus of claim 1, whereinthe instructions to refrain from rescheduling the first transmissionfurther are executable by the processor to cause the apparatus to:cancel reception of the first transmission irrespective of dropping thesecond transmission.
 3. The apparatus of claim 2, wherein the firsttransmission comprises a semi-statically configured downlinktransmission and the second transmission comprises a dynamicallyscheduled uplink transmission.
 4. The apparatus of claim 1, wherein theinstructions to refrain from rescheduling the first transmission furtherare executable by the processor to cause the apparatus to: canceltransmission of the first transmission irrespective of dropping thesecond transmission.
 5. The apparatus of claim 4, wherein the firsttransmission comprises a first uplink transmission and the secondtransmission comprises a second uplink transmission, and wherein thefirst grant comprises a configured grant and the second grant comprisesa dynamic grant.
 6. The apparatus of claim 1, wherein the indicationcomprises an uplink cancellation indication.
 7. The apparatus of claim1, wherein the UE is configured for half duplex communications, andwherein the first grant comprises radio resource control signaling for aset of flexible symbols.
 8. The apparatus of claim 7, wherein theindication comprises a slot format indicator or downlink controlinformation.
 9. An apparatus for wireless communications at a networkentity, comprising: a processor, memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to: transmit a first grant for a first transmissionscheduled for a first set of resources; transmit a second grant for asecond transmission scheduled for a second set of resources thatoverlaps with the first set of resources; transmit an indication for auser equipment (UE) to at least partially cancel the second transmissionbased at least in part on a third transmission scheduled for a third setof resources that overlaps with the second set of resources; and refrainfrom rescheduling the first transmission on the first set of resourcesbased at least in part on transmitting the indication.
 10. The apparatusof claim 9, wherein the instructions to refrain from rescheduling thefirst transmission further are executable by the processor to cause theapparatus to: cancel transmission of the first transmission irrespectiveof the indication.
 11. The apparatus of claim 10, wherein the firsttransmission comprises a semi-statically configured downlinktransmission and the second transmission comprises a dynamicallyscheduled uplink transmission.
 12. The apparatus of claim 9, wherein theinstructions to refrain from rescheduling the first transmission furtherare executable by the processor to cause the apparatus to: cancelreception of the first transmission irrespective of the indication. 13.The apparatus of claim 12, wherein the first transmission comprises afirst uplink transmission and the second transmission comprises a seconduplink transmission, and wherein the first grant comprises a configuredgrant and the second grant comprises a dynamic grant.
 14. The apparatusof claim 9, wherein the indication comprises an uplink cancellationindication.
 15. The apparatus of claim 9, wherein the UE is configuredfor half duplex communications, and wherein the first grant comprisesradio resource control signaling for a set of flexible symbols.
 16. Theapparatus of claim 15, wherein the indication comprises a slot formatindicator or downlink control information.
 17. A method for wirelesscommunications at a user equipment (UE), comprising: receiving a firstgrant for a first transmission scheduled for a first set of resources;receiving a second grant for a second transmission scheduled for asecond set of resources that overlaps with the first set of resources;dropping at least a portion of the first transmission based at least inpart on receiving the second grant; receiving an indication for the UEto at least partially cancel the second transmission; dropping at leasta portion of the second transmission based at least in part on receivingthe indication; and refraining from rescheduling the first transmissionon the first set of resources based at least in part on receiving theindication and irrespective of dropping the second transmission.
 18. Themethod of claim 17, wherein refraining from rescheduling the firsttransmission further comprises: cancelling reception of the firsttransmission irrespective of dropping the second transmission.
 19. Themethod of claim 18, wherein the first transmission comprises asemi-statically configured downlink transmission and the secondtransmission comprises a dynamically scheduled uplink transmission. 20.The method of claim 17, wherein refraining from rescheduling the firsttransmission further comprises: cancelling transmission of the firsttransmission irrespective of dropping the second transmission.
 21. Themethod of claim 20, wherein the first transmission comprises a firstuplink transmission and the second transmission comprises a seconduplink transmission, and wherein the first grant comprises a configuredgrant and the second grant comprises a dynamic grant.
 22. The method ofclaim 17, wherein the indication comprises an uplink cancellationindication.
 23. The method of claim 17, wherein the UE is configured forhalf duplex communications, and wherein the first grant comprises radioresource control signaling for a set of flexible symbols.
 24. The methodof claim 23, wherein the indication comprises a slot format indicator ordownlink control information.
 25. A method for wireless communicationsat a network entity, comprising: transmitting a first grant for a firsttransmission scheduled for a first set of resources; transmitting asecond grant for a second transmission scheduled for a second set ofresources that overlaps with the first set of resources; transmitting anindication for a user equipment (UE) to at least partially cancel thesecond transmission based at least in part on a third transmissionscheduled for a third set of resources that overlaps with the second setof resources; and refraining from rescheduling the first transmission onthe first set of resources based at least in part on transmitting theindication.
 26. The method of claim 25, wherein refraining fromrescheduling the first transmission further comprises: cancellingtransmission of the first transmission irrespective of the indication.27. The method of claim 26, wherein the first transmission comprises asemi-statically configured downlink transmission and the secondtransmission comprises a dynamically scheduled uplink transmission. 28.The method of claim 25, wherein refraining from rescheduling the firsttransmission further comprises: cancelling reception of the firsttransmission irrespective of the indication.
 29. The method of claim 28,wherein the first transmission comprises a first uplink transmission andthe second transmission comprises a second uplink transmission, andwherein the first grant comprises a configured grant and the secondgrant comprises a dynamic grant.
 30. The method of claim 25, wherein theindication comprises an uplink cancellation indication.